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Simplifying 100 = (2x)(x + 5) Remove parenthesis around (2x) 100 = 2x(x + 5) Reorder the terms: 100 = 2x(5 + x) 100 = (5 * 2x + x * 2x) 100 = (10x + 2x2) Solving 100 = 10x + 2x2 Solving for variable 'x'. Reorder the terms: 100 + -10x + -2x2 = 10x + -10x + 2x2 + -2x2 Combine like terms: 10x + -10x = 0 100 + -10x + -2x2 = 0 + 2x2 + -2x2 100 + -10x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 100 + -10x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(50 + -5x + -1x2) = 0 Factor a trinomial. 2((5 + -1x)(10 + x)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5Subproblem 2
Set the factor '(10 + x)' equal to zero and attempt to solve: Simplifying 10 + x = 0 Solving 10 + x = 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 + x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + x = 0 + -10 x = 0 + -10 Combine like terms: 0 + -10 = -10 x = -10 Simplifying x = -10Solution
x = {5, -10}
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