7*x^2+77*x-12=408

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Solution for 7*x^2+77*x-12=408 equation:


Simplifying
7x2 + 77x + -12 = 408

Reorder the terms:
-12 + 77x + 7x2 = 408

Solving
-12 + 77x + 7x2 = 408

Solving for variable 'x'.

Reorder the terms:
-12 + -408 + 77x + 7x2 = 408 + -408

Combine like terms: -12 + -408 = -420
-420 + 77x + 7x2 = 408 + -408

Combine like terms: 408 + -408 = 0
-420 + 77x + 7x2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(-60 + 11x + x2) = 0

Factor a trinomial.
7((-15 + -1x)(4 + -1x)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(-15 + -1x)' equal to zero and attempt to solve: Simplifying -15 + -1x = 0 Solving -15 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + -1x = 0 + 15 Combine like terms: -15 + 15 = 0 0 + -1x = 0 + 15 -1x = 0 + 15 Combine like terms: 0 + 15 = 15 -1x = 15 Divide each side by '-1'. x = -15 Simplifying x = -15

Subproblem 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-15, 4}

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