2(x-1)(x+3)-x(x+3)=66

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Solution for 2(x-1)(x+3)-x(x+3)=66 equation:


Simplifying
2(x + -1)(x + 3) + -1x(x + 3) = 66

Reorder the terms:
2(-1 + x)(x + 3) + -1x(x + 3) = 66

Reorder the terms:
2(-1 + x)(3 + x) + -1x(x + 3) = 66

Multiply (-1 + x) * (3 + x)
2(-1(3 + x) + x(3 + x)) + -1x(x + 3) = 66
2((3 * -1 + x * -1) + x(3 + x)) + -1x(x + 3) = 66
2((-3 + -1x) + x(3 + x)) + -1x(x + 3) = 66
2(-3 + -1x + (3 * x + x * x)) + -1x(x + 3) = 66
2(-3 + -1x + (3x + x2)) + -1x(x + 3) = 66

Combine like terms: -1x + 3x = 2x
2(-3 + 2x + x2) + -1x(x + 3) = 66
(-3 * 2 + 2x * 2 + x2 * 2) + -1x(x + 3) = 66
(-6 + 4x + 2x2) + -1x(x + 3) = 66

Reorder the terms:
-6 + 4x + 2x2 + -1x(3 + x) = 66
-6 + 4x + 2x2 + (3 * -1x + x * -1x) = 66
-6 + 4x + 2x2 + (-3x + -1x2) = 66

Reorder the terms:
-6 + 4x + -3x + 2x2 + -1x2 = 66

Combine like terms: 4x + -3x = 1x
-6 + 1x + 2x2 + -1x2 = 66

Combine like terms: 2x2 + -1x2 = 1x2
-6 + 1x + 1x2 = 66

Solving
-6 + 1x + 1x2 = 66

Solving for variable 'x'.

Reorder the terms:
-6 + -66 + 1x + 1x2 = 66 + -66

Combine like terms: -6 + -66 = -72
-72 + 1x + 1x2 = 66 + -66

Combine like terms: 66 + -66 = 0
-72 + 1x + 1x2 = 0

Factor a trinomial.
(-9 + -1x)(8 + -1x) = 0

Subproblem 1

Set the factor '(-9 + -1x)' equal to zero and attempt to solve: Simplifying -9 + -1x = 0 Solving -9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -1x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -1x = 0 + 9 -1x = 0 + 9 Combine like terms: 0 + 9 = 9 -1x = 9 Divide each side by '-1'. x = -9 Simplifying x = -9

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {-9, 8}

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