0=-20x^2+40x+5100

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Solution for 0=-20x^2+40x+5100 equation:


Simplifying
0 = -20x2 + 40x + 5100

Reorder the terms:
0 = 5100 + 40x + -20x2

Solving
0 = 5100 + 40x + -20x2

Solving for variable 'x'.

Combine like terms: 0 + -5100 = -5100
-5100 + -40x + 20x2 = 5100 + 40x + -20x2 + -5100 + -40x + 20x2

Reorder the terms:
-5100 + -40x + 20x2 = 5100 + -5100 + 40x + -40x + -20x2 + 20x2

Combine like terms: 5100 + -5100 = 0
-5100 + -40x + 20x2 = 0 + 40x + -40x + -20x2 + 20x2
-5100 + -40x + 20x2 = 40x + -40x + -20x2 + 20x2

Combine like terms: 40x + -40x = 0
-5100 + -40x + 20x2 = 0 + -20x2 + 20x2
-5100 + -40x + 20x2 = -20x2 + 20x2

Combine like terms: -20x2 + 20x2 = 0
-5100 + -40x + 20x2 = 0

Factor out the Greatest Common Factor (GCF), '20'.
20(-255 + -2x + x2) = 0

Factor a trinomial.
20((-15 + -1x)(17 + -1x)) = 0

Ignore the factor 20.

Subproblem 1

Set the factor '(-15 + -1x)' equal to zero and attempt to solve: Simplifying -15 + -1x = 0 Solving -15 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + -1x = 0 + 15 Combine like terms: -15 + 15 = 0 0 + -1x = 0 + 15 -1x = 0 + 15 Combine like terms: 0 + 15 = 15 -1x = 15 Divide each side by '-1'. x = -15 Simplifying x = -15

Subproblem 2

Set the factor '(17 + -1x)' equal to zero and attempt to solve: Simplifying 17 + -1x = 0 Solving 17 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-17' to each side of the equation. 17 + -17 + -1x = 0 + -17 Combine like terms: 17 + -17 = 0 0 + -1x = 0 + -17 -1x = 0 + -17 Combine like terms: 0 + -17 = -17 -1x = -17 Divide each side by '-1'. x = 17 Simplifying x = 17

Solution

x = {-15, 17}

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