(x-3)(x-20)=0

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Solution for (x-3)(x-20)=0 equation:


Simplifying
(x + -3)(x + -20) = 0

Reorder the terms:
(-3 + x)(x + -20) = 0

Reorder the terms:
(-3 + x)(-20 + x) = 0

Multiply (-3 + x) * (-20 + x)
(-3(-20 + x) + x(-20 + x)) = 0
((-20 * -3 + x * -3) + x(-20 + x)) = 0
((60 + -3x) + x(-20 + x)) = 0
(60 + -3x + (-20 * x + x * x)) = 0
(60 + -3x + (-20x + x2)) = 0

Combine like terms: -3x + -20x = -23x
(60 + -23x + x2) = 0

Solving
60 + -23x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(3 + -1x)(20 + -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 '(20 + -1x)' equal to zero and attempt to solve: Simplifying 20 + -1x = 0 Solving 20 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + -1x = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -1x = 0 + -20 -1x = 0 + -20 Combine like terms: 0 + -20 = -20 -1x = -20 Divide each side by '-1'. x = 20 Simplifying x = 20

Solution

x = {3, 20}

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