(x-3)(x-9)=0

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Solution for (x-3)(x-9)=0 equation:


Simplifying
(x + -3)(x + -9) = 0

Reorder the terms:
(-3 + x)(x + -9) = 0

Reorder the terms:
(-3 + x)(-9 + x) = 0

Multiply (-3 + x) * (-9 + x)
(-3(-9 + x) + x(-9 + x)) = 0
((-9 * -3 + x * -3) + x(-9 + x)) = 0
((27 + -3x) + x(-9 + x)) = 0
(27 + -3x + (-9 * x + x * x)) = 0
(27 + -3x + (-9x + x2)) = 0

Combine like terms: -3x + -9x = -12x
(27 + -12x + x2) = 0

Solving
27 + -12x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(3 + -1x)(9 + -1x) = 0

Subproblem 1

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Subproblem 2

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

Solution

x = {3, 9}

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