7x^2+7x-385=7

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Solution for 7x^2+7x-385=7 equation:


Simplifying
7x2 + 7x + -385 = 7

Reorder the terms:
-385 + 7x + 7x2 = 7

Solving
-385 + 7x + 7x2 = 7

Solving for variable 'x'.

Reorder the terms:
-385 + -7 + 7x + 7x2 = 7 + -7

Combine like terms: -385 + -7 = -392
-392 + 7x + 7x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-392 + 7x + 7x2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(-56 + x + x2) = 0

Factor a trinomial.
7((-8 + -1x)(7 + -1x)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(-8 + -1x)' equal to zero and attempt to solve: Simplifying -8 + -1x = 0 Solving -8 + -1x = 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 + -1x = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1x = 0 + 8 -1x = 0 + 8 Combine like terms: 0 + 8 = 8 -1x = 8 Divide each side by '-1'. x = -8 Simplifying x = -8

Subproblem 2

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 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 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Solution

x = {-8, 7}

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