2x^2-2x=40

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Solution for 2x^2-2x=40 equation:


Simplifying
2x2 + -2x = 40

Reorder the terms:
-2x + 2x2 = 40

Solving
-2x + 2x2 = 40

Solving for variable 'x'.

Reorder the terms:
-40 + -2x + 2x2 = 40 + -40

Combine like terms: 40 + -40 = 0
-40 + -2x + 2x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-20 + -1x + x2) = 0

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

Ignore the factor 2.

Subproblem 1

Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 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 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {-4, 5}

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