100x-x^2=900

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Solution for 100x-x^2=900 equation:


Simplifying
100x + -1x2 = 900

Solving
100x + -1x2 = 900

Solving for variable 'x'.

Reorder the terms:
-900 + 100x + -1x2 = 900 + -900

Combine like terms: 900 + -900 = 0
-900 + 100x + -1x2 = 0

Factor a trinomial.
(-90 + x)(10 + -1x) = 0

Subproblem 1

Set the factor '(-90 + x)' equal to zero and attempt to solve: Simplifying -90 + x = 0 Solving -90 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '90' to each side of the equation. -90 + 90 + x = 0 + 90 Combine like terms: -90 + 90 = 0 0 + x = 0 + 90 x = 0 + 90 Combine like terms: 0 + 90 = 90 x = 90 Simplifying x = 90

Subproblem 2

Set the factor '(10 + -1x)' equal to zero and attempt to solve: Simplifying 10 + -1x = 0 Solving 10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -1x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1x = 0 + -10 -1x = 0 + -10 Combine like terms: 0 + -10 = -10 -1x = -10 Divide each side by '-1'. x = 10 Simplifying x = 10

Solution

x = {90, 10}

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