20x^2-8x=64

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Solution for 20x^2-8x=64 equation:


Simplifying
20x2 + -8x = 64

Reorder the terms:
-8x + 20x2 = 64

Solving
-8x + 20x2 = 64

Solving for variable 'x'.

Reorder the terms:
-64 + -8x + 20x2 = 64 + -64

Combine like terms: 64 + -64 = 0
-64 + -8x + 20x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-16 + -2x + 5x2) = 0

Factor a trinomial.
4((-8 + -5x)(2 + -1x)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-8 + -5x)' equal to zero and attempt to solve: Simplifying -8 + -5x = 0 Solving -8 + -5x = 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 + -5x = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -5x = 0 + 8 -5x = 0 + 8 Combine like terms: 0 + 8 = 8 -5x = 8 Divide each side by '-5'. x = -1.6 Simplifying x = -1.6

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {-1.6, 2}

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