-5x^2+18x+8=x-7x^2

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Solution for -5x^2+18x+8=x-7x^2 equation:


Simplifying
-5x2 + 18x + 8 = x + -7x2

Reorder the terms:
8 + 18x + -5x2 = x + -7x2

Solving
8 + 18x + -5x2 = x + -7x2

Solving for variable 'x'.

Reorder the terms:
8 + 18x + -1x + -5x2 + 7x2 = x + -7x2 + -1x + 7x2

Combine like terms: 18x + -1x = 17x
8 + 17x + -5x2 + 7x2 = x + -7x2 + -1x + 7x2

Combine like terms: -5x2 + 7x2 = 2x2
8 + 17x + 2x2 = x + -7x2 + -1x + 7x2

Reorder the terms:
8 + 17x + 2x2 = x + -1x + -7x2 + 7x2

Combine like terms: x + -1x = 0
8 + 17x + 2x2 = 0 + -7x2 + 7x2
8 + 17x + 2x2 = -7x2 + 7x2

Combine like terms: -7x2 + 7x2 = 0
8 + 17x + 2x2 = 0

Factor a trinomial.
(8 + x)(1 + 2x) = 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 + 2x)' equal to zero and attempt to solve: Simplifying 1 + 2x = 0 Solving 1 + 2x = 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 + 2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 0 + -1 2x = 0 + -1 Combine like terms: 0 + -1 = -1 2x = -1 Divide each side by '2'. x = -0.5 Simplifying x = -0.5

Solution

x = {-8, -0.5}

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