8x^2+18x=-7

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


Simplifying
8x2 + 18x = -7

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

Solving
18x + 8x2 = -7

Solving for variable 'x'.

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

Combine like terms: -7 + 7 = 0
7 + 18x + 8x2 = 0

Factor a trinomial.
(7 + 4x)(1 + 2x) = 0

Subproblem 1

Set the factor '(7 + 4x)' equal to zero and attempt to solve: Simplifying 7 + 4x = 0 Solving 7 + 4x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 4x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 4x = 0 + -7 4x = 0 + -7 Combine like terms: 0 + -7 = -7 4x = -7 Divide each side by '4'. x = -1.75 Simplifying x = -1.75

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 = {-1.75, -0.5}

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