(x+2)(x-3)+2=7(2x+4)-19

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Solution for (x+2)(x-3)+2=7(2x+4)-19 equation:


Simplifying
(x + 2)(x + -3) + 2 = 7(2x + 4) + -19

Reorder the terms:
(2 + x)(x + -3) + 2 = 7(2x + 4) + -19

Reorder the terms:
(2 + x)(-3 + x) + 2 = 7(2x + 4) + -19

Multiply (2 + x) * (-3 + x)
(2(-3 + x) + x(-3 + x)) + 2 = 7(2x + 4) + -19
((-3 * 2 + x * 2) + x(-3 + x)) + 2 = 7(2x + 4) + -19
((-6 + 2x) + x(-3 + x)) + 2 = 7(2x + 4) + -19
(-6 + 2x + (-3 * x + x * x)) + 2 = 7(2x + 4) + -19
(-6 + 2x + (-3x + x2)) + 2 = 7(2x + 4) + -19

Combine like terms: 2x + -3x = -1x
(-6 + -1x + x2) + 2 = 7(2x + 4) + -19

Reorder the terms:
-6 + 2 + -1x + x2 = 7(2x + 4) + -19

Combine like terms: -6 + 2 = -4
-4 + -1x + x2 = 7(2x + 4) + -19

Reorder the terms:
-4 + -1x + x2 = 7(4 + 2x) + -19
-4 + -1x + x2 = (4 * 7 + 2x * 7) + -19
-4 + -1x + x2 = (28 + 14x) + -19

Reorder the terms:
-4 + -1x + x2 = 28 + -19 + 14x

Combine like terms: 28 + -19 = 9
-4 + -1x + x2 = 9 + 14x

Solving
-4 + -1x + x2 = 9 + 14x

Solving for variable 'x'.

Reorder the terms:
-4 + -9 + -1x + -14x + x2 = 9 + 14x + -9 + -14x

Combine like terms: -4 + -9 = -13
-13 + -1x + -14x + x2 = 9 + 14x + -9 + -14x

Combine like terms: -1x + -14x = -15x
-13 + -15x + x2 = 9 + 14x + -9 + -14x

Reorder the terms:
-13 + -15x + x2 = 9 + -9 + 14x + -14x

Combine like terms: 9 + -9 = 0
-13 + -15x + x2 = 0 + 14x + -14x
-13 + -15x + x2 = 14x + -14x

Combine like terms: 14x + -14x = 0
-13 + -15x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + -15x + 13 + x2 = 0 + 13

Reorder the terms:
-13 + 13 + -15x + x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -15x + x2 = 0 + 13
-15x + x2 = 0 + 13

Combine like terms: 0 + 13 = 13
-15x + x2 = 13

The x term is -15x.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15x + 56.25 + x2 = 13 + 56.25

Reorder the terms:
56.25 + -15x + x2 = 13 + 56.25

Combine like terms: 13 + 56.25 = 69.25
56.25 + -15x + x2 = 69.25

Factor a perfect square on the left side:
(x + -7.5)(x + -7.5) = 69.25

Calculate the square root of the right side: 8.321658489

Break this problem into two subproblems by setting 
(x + -7.5) equal to 8.321658489 and -8.321658489.

Subproblem 1

x + -7.5 = 8.321658489 Simplifying x + -7.5 = 8.321658489 Reorder the terms: -7.5 + x = 8.321658489 Solving -7.5 + x = 8.321658489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = 8.321658489 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = 8.321658489 + 7.5 x = 8.321658489 + 7.5 Combine like terms: 8.321658489 + 7.5 = 15.821658489 x = 15.821658489 Simplifying x = 15.821658489

Subproblem 2

x + -7.5 = -8.321658489 Simplifying x + -7.5 = -8.321658489 Reorder the terms: -7.5 + x = -8.321658489 Solving -7.5 + x = -8.321658489 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + x = -8.321658489 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + x = -8.321658489 + 7.5 x = -8.321658489 + 7.5 Combine like terms: -8.321658489 + 7.5 = -0.821658489 x = -0.821658489 Simplifying x = -0.821658489

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.821658489, -0.821658489}

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