4x(2x-4)=90

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Solution for 4x(2x-4)=90 equation:


Simplifying
4x(2x + -4) = 90

Reorder the terms:
4x(-4 + 2x) = 90
(-4 * 4x + 2x * 4x) = 90
(-16x + 8x2) = 90

Solving
-16x + 8x2 = 90

Solving for variable 'x'.

Reorder the terms:
-90 + -16x + 8x2 = 90 + -90

Combine like terms: 90 + -90 = 0
-90 + -16x + 8x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-45 + -8x + 4x2) = 0

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

Ignore the factor 2.

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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