90x-5x^2=85

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Solution for 90x-5x^2=85 equation:


Simplifying
90x + -5x2 = 85

Solving
90x + -5x2 = 85

Solving for variable 'x'.

Reorder the terms:
-85 + 90x + -5x2 = 85 + -85

Combine like terms: 85 + -85 = 0
-85 + 90x + -5x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-17 + 18x + -1x2) = 0

Factor a trinomial.
5((-17 + x)(1 + -1x)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-17 + x)' equal to zero and attempt to solve: Simplifying -17 + x = 0 Solving -17 + x = 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 + x = 0 + 17 Combine like terms: -17 + 17 = 0 0 + x = 0 + 17 x = 0 + 17 Combine like terms: 0 + 17 = 17 x = 17 Simplifying x = 17

Subproblem 2

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

Solution

x = {17, 1}

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