5x(x-1)-2(2x^2-7x)=-8

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Solution for 5x(x-1)-2(2x^2-7x)=-8 equation:


Simplifying
5x(x + -1) + -2(2x2 + -7x) = -8

Reorder the terms:
5x(-1 + x) + -2(2x2 + -7x) = -8
(-1 * 5x + x * 5x) + -2(2x2 + -7x) = -8
(-5x + 5x2) + -2(2x2 + -7x) = -8

Reorder the terms:
-5x + 5x2 + -2(-7x + 2x2) = -8
-5x + 5x2 + (-7x * -2 + 2x2 * -2) = -8
-5x + 5x2 + (14x + -4x2) = -8

Reorder the terms:
-5x + 14x + 5x2 + -4x2 = -8

Combine like terms: -5x + 14x = 9x
9x + 5x2 + -4x2 = -8

Combine like terms: 5x2 + -4x2 = 1x2
9x + 1x2 = -8

Solving
9x + 1x2 = -8

Solving for variable 'x'.

Reorder the terms:
8 + 9x + 1x2 = -8 + 8

Combine like terms: -8 + 8 = 0
8 + 9x + 1x2 = 0

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

Subproblem 1

Set the factor '(8 + x)' equal to zero and attempt to solve: Simplifying 8 + x = 0 Solving 8 + x = 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 + x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + x = 0 + -8 x = 0 + -8 Combine like terms: 0 + -8 = -8 x = -8 Simplifying x = -8

Subproblem 2

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

Solution

x = {-8, -1}

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