x^2-9x+20=20

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Solution for x^2-9x+20=20 equation:


Simplifying
x2 + -9x + 20 = 20

Reorder the terms:
20 + -9x + x2 = 20

Add '-20' to each side of the equation.
20 + -9x + -20 + x2 = 20 + -20

Reorder the terms:
20 + -20 + -9x + x2 = 20 + -20

Combine like terms: 20 + -20 = 0
0 + -9x + x2 = 20 + -20
-9x + x2 = 20 + -20

Combine like terms: 20 + -20 = 0
-9x + x2 = 0

Solving
-9x + x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), 'x'.
x(-9 + x) = 0

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(-9 + x)' equal to zero and attempt to solve: Simplifying -9 + x = 0 Solving -9 + x = 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 + x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + x = 0 + 9 x = 0 + 9 Combine like terms: 0 + 9 = 9 x = 9 Simplifying x = 9

Solution

x = {0, 9}

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