4x^2-8x-36=9

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Solution for 4x^2-8x-36=9 equation:


Simplifying
4x2 + -8x + -36 = 9

Reorder the terms:
-36 + -8x + 4x2 = 9

Solving
-36 + -8x + 4x2 = 9

Solving for variable 'x'.

Reorder the terms:
-36 + -9 + -8x + 4x2 = 9 + -9

Combine like terms: -36 + -9 = -45
-45 + -8x + 4x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-45 + -8x + 4x2 = 0

Factor a trinomial.
(-5 + -2x)(9 + -2x) = 0

Subproblem 1

Set the factor '(-5 + -2x)' equal to zero and attempt to solve: Simplifying -5 + -2x = 0 Solving -5 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -2x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -2x = 0 + 5 -2x = 0 + 5 Combine like terms: 0 + 5 = 5 -2x = 5 Divide each side by '-2'. x = -2.5 Simplifying x = -2.5

Subproblem 2

Set the factor '(9 + -2x)' equal to zero and attempt to solve: Simplifying 9 + -2x = 0 Solving 9 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -2x = 0 + -9 -2x = 0 + -9 Combine like terms: 0 + -9 = -9 -2x = -9 Divide each side by '-2'. x = 4.5 Simplifying x = 4.5

Solution

x = {-2.5, 4.5}

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