x^2=19x-90

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Solution for x^2=19x-90 equation:


Simplifying
x2 = 19x + -90

Reorder the terms:
x2 = -90 + 19x

Solving
x2 = -90 + 19x

Solving for variable 'x'.

Reorder the terms:
90 + -19x + x2 = -90 + 19x + 90 + -19x

Reorder the terms:
90 + -19x + x2 = -90 + 90 + 19x + -19x

Combine like terms: -90 + 90 = 0
90 + -19x + x2 = 0 + 19x + -19x
90 + -19x + x2 = 19x + -19x

Combine like terms: 19x + -19x = 0
90 + -19x + x2 = 0

Factor a trinomial.
(9 + -1x)(10 + -1x) = 0

Subproblem 1

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

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 = {9, 10}

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