(3x-7)2+5(2x+1)(x-2)=-x^2-[-(3x+1)]

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Solution for (3x-7)2+5(2x+1)(x-2)=-x^2-[-(3x+1)] equation:


Simplifying
(3x + -7) * 2 + 5(2x + 1)(x + -2) = -1x2 + -1[-1(3x + 1)]

Reorder the terms:
(-7 + 3x) * 2 + 5(2x + 1)(x + -2) = -1x2 + -1[-1(3x + 1)]

Reorder the terms for easier multiplication:
2(-7 + 3x) + 5(2x + 1)(x + -2) = -1x2 + -1[-1(3x + 1)]
(-7 * 2 + 3x * 2) + 5(2x + 1)(x + -2) = -1x2 + -1[-1(3x + 1)]
(-14 + 6x) + 5(2x + 1)(x + -2) = -1x2 + -1[-1(3x + 1)]

Reorder the terms:
-14 + 6x + 5(1 + 2x)(x + -2) = -1x2 + -1[-1(3x + 1)]

Reorder the terms:
-14 + 6x + 5(1 + 2x)(-2 + x) = -1x2 + -1[-1(3x + 1)]

Multiply (1 + 2x) * (-2 + x)
-14 + 6x + 5(1(-2 + x) + 2x * (-2 + x)) = -1x2 + -1[-1(3x + 1)]
-14 + 6x + 5((-2 * 1 + x * 1) + 2x * (-2 + x)) = -1x2 + -1[-1(3x + 1)]
-14 + 6x + 5((-2 + 1x) + 2x * (-2 + x)) = -1x2 + -1[-1(3x + 1)]
-14 + 6x + 5(-2 + 1x + (-2 * 2x + x * 2x)) = -1x2 + -1[-1(3x + 1)]
-14 + 6x + 5(-2 + 1x + (-4x + 2x2)) = -1x2 + -1[-1(3x + 1)]

Combine like terms: 1x + -4x = -3x
-14 + 6x + 5(-2 + -3x + 2x2) = -1x2 + -1[-1(3x + 1)]
-14 + 6x + (-2 * 5 + -3x * 5 + 2x2 * 5) = -1x2 + -1[-1(3x + 1)]
-14 + 6x + (-10 + -15x + 10x2) = -1x2 + -1[-1(3x + 1)]

Reorder the terms:
-14 + -10 + 6x + -15x + 10x2 = -1x2 + -1[-1(3x + 1)]

Combine like terms: -14 + -10 = -24
-24 + 6x + -15x + 10x2 = -1x2 + -1[-1(3x + 1)]

Combine like terms: 6x + -15x = -9x
-24 + -9x + 10x2 = -1x2 + -1[-1(3x + 1)]

Reorder the terms:
-24 + -9x + 10x2 = -1x2 + -1[-1(1 + 3x)]
-24 + -9x + 10x2 = -1x2 + -1[(1 * -1 + 3x * -1)]
-24 + -9x + 10x2 = -1x2 + -1[(-1 + -3x)]
-24 + -9x + 10x2 = -1x2 + [-1 * -1 + -3x * -1]
-24 + -9x + 10x2 = -1x2 + [1 + 3x]

Reorder the terms:
-24 + -9x + 10x2 = 1 + 3x + -1x2

Solving
-24 + -9x + 10x2 = 1 + 3x + -1x2

Solving for variable 'x'.

Reorder the terms:
-24 + -1 + -9x + -3x + 10x2 + x2 = 1 + 3x + -1x2 + -1 + -3x + x2

Combine like terms: -24 + -1 = -25
-25 + -9x + -3x + 10x2 + x2 = 1 + 3x + -1x2 + -1 + -3x + x2

Combine like terms: -9x + -3x = -12x
-25 + -12x + 10x2 + x2 = 1 + 3x + -1x2 + -1 + -3x + x2

Combine like terms: 10x2 + x2 = 11x2
-25 + -12x + 11x2 = 1 + 3x + -1x2 + -1 + -3x + x2

Reorder the terms:
-25 + -12x + 11x2 = 1 + -1 + 3x + -3x + -1x2 + x2

Combine like terms: 1 + -1 = 0
-25 + -12x + 11x2 = 0 + 3x + -3x + -1x2 + x2
-25 + -12x + 11x2 = 3x + -3x + -1x2 + x2

Combine like terms: 3x + -3x = 0
-25 + -12x + 11x2 = 0 + -1x2 + x2
-25 + -12x + 11x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-25 + -12x + 11x2 = 0

Begin completing the square.  Divide all terms by
11 the coefficient of the squared term: 

Divide each side by '11'.
-2.272727273 + -1.090909091x + x2 = 0

Move the constant term to the right:

Add '2.272727273' to each side of the equation.
-2.272727273 + -1.090909091x + 2.272727273 + x2 = 0 + 2.272727273

Reorder the terms:
-2.272727273 + 2.272727273 + -1.090909091x + x2 = 0 + 2.272727273

Combine like terms: -2.272727273 + 2.272727273 = 0.000000000
0.000000000 + -1.090909091x + x2 = 0 + 2.272727273
-1.090909091x + x2 = 0 + 2.272727273

Combine like terms: 0 + 2.272727273 = 2.272727273
-1.090909091x + x2 = 2.272727273

The x term is -1.090909091x.  Take half its coefficient (-0.5454545455).
Square it (0.2975206612) and add it to both sides.

Add '0.2975206612' to each side of the equation.
-1.090909091x + 0.2975206612 + x2 = 2.272727273 + 0.2975206612

Reorder the terms:
0.2975206612 + -1.090909091x + x2 = 2.272727273 + 0.2975206612

Combine like terms: 2.272727273 + 0.2975206612 = 2.5702479342
0.2975206612 + -1.090909091x + x2 = 2.5702479342

Factor a perfect square on the left side:
(x + -0.5454545455)(x + -0.5454545455) = 2.5702479342

Calculate the square root of the right side: 1.603199281

Break this problem into two subproblems by setting 
(x + -0.5454545455) equal to 1.603199281 and -1.603199281.

Subproblem 1

x + -0.5454545455 = 1.603199281 Simplifying x + -0.5454545455 = 1.603199281 Reorder the terms: -0.5454545455 + x = 1.603199281 Solving -0.5454545455 + x = 1.603199281 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5454545455' to each side of the equation. -0.5454545455 + 0.5454545455 + x = 1.603199281 + 0.5454545455 Combine like terms: -0.5454545455 + 0.5454545455 = 0.0000000000 0.0000000000 + x = 1.603199281 + 0.5454545455 x = 1.603199281 + 0.5454545455 Combine like terms: 1.603199281 + 0.5454545455 = 2.1486538265 x = 2.1486538265 Simplifying x = 2.1486538265

Subproblem 2

x + -0.5454545455 = -1.603199281 Simplifying x + -0.5454545455 = -1.603199281 Reorder the terms: -0.5454545455 + x = -1.603199281 Solving -0.5454545455 + x = -1.603199281 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5454545455' to each side of the equation. -0.5454545455 + 0.5454545455 + x = -1.603199281 + 0.5454545455 Combine like terms: -0.5454545455 + 0.5454545455 = 0.0000000000 0.0000000000 + x = -1.603199281 + 0.5454545455 x = -1.603199281 + 0.5454545455 Combine like terms: -1.603199281 + 0.5454545455 = -1.0577447355 x = -1.0577447355 Simplifying x = -1.0577447355

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.1486538265, -1.0577447355}

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