2x^2+6x-36=720

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Solution for 2x^2+6x-36=720 equation:


Simplifying
2x2 + 6x + -36 = 720

Reorder the terms:
-36 + 6x + 2x2 = 720

Solving
-36 + 6x + 2x2 = 720

Solving for variable 'x'.

Reorder the terms:
-36 + -720 + 6x + 2x2 = 720 + -720

Combine like terms: -36 + -720 = -756
-756 + 6x + 2x2 = 720 + -720

Combine like terms: 720 + -720 = 0
-756 + 6x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-378 + 3x + x2) = 0

Factor a trinomial.
2((-21 + -1x)(18 + -1x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-21 + -1x)' equal to zero and attempt to solve: Simplifying -21 + -1x = 0 Solving -21 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -1x = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -1x = 0 + 21 -1x = 0 + 21 Combine like terms: 0 + 21 = 21 -1x = 21 Divide each side by '-1'. x = -21 Simplifying x = -21

Subproblem 2

Set the factor '(18 + -1x)' equal to zero and attempt to solve: Simplifying 18 + -1x = 0 Solving 18 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + -1x = 0 + -18 Combine like terms: 18 + -18 = 0 0 + -1x = 0 + -18 -1x = 0 + -18 Combine like terms: 0 + -18 = -18 -1x = -18 Divide each side by '-1'. x = 18 Simplifying x = 18

Solution

x = {-21, 18}

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