7x^2-18=-39x

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Solution for 7x^2-18=-39x equation:


Simplifying
7x2 + -18 = -39x

Reorder the terms:
-18 + 7x2 = -39x

Solving
-18 + 7x2 = -39x

Solving for variable 'x'.

Reorder the terms:
-18 + 39x + 7x2 = -39x + 39x

Combine like terms: -39x + 39x = 0
-18 + 39x + 7x2 = 0

Factor a trinomial.
(-6 + -1x)(3 + -7x) = 0

Subproblem 1

Set the factor '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6

Subproblem 2

Set the factor '(3 + -7x)' equal to zero and attempt to solve: Simplifying 3 + -7x = 0 Solving 3 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -7x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -7x = 0 + -3 -7x = 0 + -3 Combine like terms: 0 + -3 = -3 -7x = -3 Divide each side by '-7'. x = 0.4285714286 Simplifying x = 0.4285714286

Solution

x = {-6, 0.4285714286}

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