0=-x^2+9x-8

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Solution for 0=-x^2+9x-8 equation:


Simplifying
0 = -1x2 + 9x + -8

Reorder the terms:
0 = -8 + 9x + -1x2

Solving
0 = -8 + 9x + -1x2

Solving for variable 'x'.

Combine like terms: 0 + 8 = 8
8 + -9x + x2 = -8 + 9x + -1x2 + 8 + -9x + x2

Reorder the terms:
8 + -9x + x2 = -8 + 8 + 9x + -9x + -1x2 + x2

Combine like terms: -8 + 8 = 0
8 + -9x + x2 = 0 + 9x + -9x + -1x2 + x2
8 + -9x + x2 = 9x + -9x + -1x2 + x2

Combine like terms: 9x + -9x = 0
8 + -9x + x2 = 0 + -1x2 + x2
8 + -9x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
8 + -9x + x2 = 0

Factor a trinomial.
(1 + -1x)(8 + -1x) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {1, 8}

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