(x-10)(x+20)=0

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Solution for (x-10)(x+20)=0 equation:


Simplifying
(x + -10)(x + 20) = 0

Reorder the terms:
(-10 + x)(x + 20) = 0

Reorder the terms:
(-10 + x)(20 + x) = 0

Multiply (-10 + x) * (20 + x)
(-10(20 + x) + x(20 + x)) = 0
((20 * -10 + x * -10) + x(20 + x)) = 0
((-200 + -10x) + x(20 + x)) = 0
(-200 + -10x + (20 * x + x * x)) = 0
(-200 + -10x + (20x + x2)) = 0

Combine like terms: -10x + 20x = 10x
(-200 + 10x + x2) = 0

Solving
-200 + 10x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(-20 + -1x)(10 + -1x) = 0

Subproblem 1

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

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 = {-20, 10}

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