3x^2+5x-2-[2-x^2+2x+5]=

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Solution for 3x^2+5x-2-[2-x^2+2x+5]= equation:


Simplifying
3x2 + 5x + -2 + -1[2 + -1x2 + 2x + 5] = 0

Reorder the terms:
3x2 + 5x + -2 + -1[2 + 5 + 2x + -1x2] = 0

Combine like terms: 2 + 5 = 7
3x2 + 5x + -2 + -1[7 + 2x + -1x2] = 0
3x2 + 5x + -2 + [7 * -1 + 2x * -1 + -1x2 * -1] = 0
3x2 + 5x + -2 + [-7 + -2x + 1x2] = 0

Reorder the terms:
-2 + -7 + 5x + -2x + 3x2 + 1x2 = 0

Combine like terms: -2 + -7 = -9
-9 + 5x + -2x + 3x2 + 1x2 = 0

Combine like terms: 5x + -2x = 3x
-9 + 3x + 3x2 + 1x2 = 0

Combine like terms: 3x2 + 1x2 = 4x2
-9 + 3x + 4x2 = 0

Solving
-9 + 3x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-2.25 + 0.75x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + 0.75x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + 0.75x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + 0.75x + x2 = 0 + 2.25
0.75x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
0.75x + x2 = 2.25

The x term is 0.75x.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75x + 0.140625 + x2 = 2.25 + 0.140625

Reorder the terms:
0.140625 + 0.75x + x2 = 2.25 + 0.140625

Combine like terms: 2.25 + 0.140625 = 2.390625
0.140625 + 0.75x + x2 = 2.390625

Factor a perfect square on the left side:
(x + 0.375)(x + 0.375) = 2.390625

Calculate the square root of the right side: 1.54616461

Break this problem into two subproblems by setting 
(x + 0.375) equal to 1.54616461 and -1.54616461.

Subproblem 1

x + 0.375 = 1.54616461 Simplifying x + 0.375 = 1.54616461 Reorder the terms: 0.375 + x = 1.54616461 Solving 0.375 + x = 1.54616461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = 1.54616461 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = 1.54616461 + -0.375 x = 1.54616461 + -0.375 Combine like terms: 1.54616461 + -0.375 = 1.17116461 x = 1.17116461 Simplifying x = 1.17116461

Subproblem 2

x + 0.375 = -1.54616461 Simplifying x + 0.375 = -1.54616461 Reorder the terms: 0.375 + x = -1.54616461 Solving 0.375 + x = -1.54616461 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + x = -1.54616461 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + x = -1.54616461 + -0.375 x = -1.54616461 + -0.375 Combine like terms: -1.54616461 + -0.375 = -1.92116461 x = -1.92116461 Simplifying x = -1.92116461

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.17116461, -1.92116461}

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