x^2+8x-2=5x-4

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Solution for x^2+8x-2=5x-4 equation:


Simplifying
x2 + 8x + -2 = 5x + -4

Reorder the terms:
-2 + 8x + x2 = 5x + -4

Reorder the terms:
-2 + 8x + x2 = -4 + 5x

Solving
-2 + 8x + x2 = -4 + 5x

Solving for variable 'x'.

Reorder the terms:
-2 + 4 + 8x + -5x + x2 = -4 + 5x + 4 + -5x

Combine like terms: -2 + 4 = 2
2 + 8x + -5x + x2 = -4 + 5x + 4 + -5x

Combine like terms: 8x + -5x = 3x
2 + 3x + x2 = -4 + 5x + 4 + -5x

Reorder the terms:
2 + 3x + x2 = -4 + 4 + 5x + -5x

Combine like terms: -4 + 4 = 0
2 + 3x + x2 = 0 + 5x + -5x
2 + 3x + x2 = 5x + -5x

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

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

Subproblem 1

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

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 = {-2, -1}

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