5x^2-20x=-5x^2+80

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Solution for 5x^2-20x=-5x^2+80 equation:


Simplifying
5x2 + -20x = -5x2 + 80

Reorder the terms:
-20x + 5x2 = -5x2 + 80

Reorder the terms:
-20x + 5x2 = 80 + -5x2

Solving
-20x + 5x2 = 80 + -5x2

Solving for variable 'x'.

Reorder the terms:
-80 + -20x + 5x2 + 5x2 = 80 + -5x2 + -80 + 5x2

Combine like terms: 5x2 + 5x2 = 10x2
-80 + -20x + 10x2 = 80 + -5x2 + -80 + 5x2

Reorder the terms:
-80 + -20x + 10x2 = 80 + -80 + -5x2 + 5x2

Combine like terms: 80 + -80 = 0
-80 + -20x + 10x2 = 0 + -5x2 + 5x2
-80 + -20x + 10x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
-80 + -20x + 10x2 = 0

Factor out the Greatest Common Factor (GCF), '10'.
10(-8 + -2x + x2) = 0

Factor a trinomial.
10((-2 + -1x)(4 + -1x)) = 0

Ignore the factor 10.

Subproblem 1

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

Subproblem 2

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

Solution

x = {-2, 4}

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