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Simplifying (x + -4)(x + 15) = 0 Reorder the terms: (-4 + x)(x + 15) = 0 Reorder the terms: (-4 + x)(15 + x) = 0 Multiply (-4 + x) * (15 + x) (-4(15 + x) + x(15 + x)) = 0 ((15 * -4 + x * -4) + x(15 + x)) = 0 ((-60 + -4x) + x(15 + x)) = 0 (-60 + -4x + (15 * x + x * x)) = 0 (-60 + -4x + (15x + x2)) = 0 Combine like terms: -4x + 15x = 11x (-60 + 11x + x2) = 0 Solving -60 + 11x + x2 = 0 Solving for variable 'x'. Factor a trinomial. (-15 + -1x)(4 + -1x) = 0Subproblem 1
Set the factor '(-15 + -1x)' equal to zero and attempt to solve: Simplifying -15 + -1x = 0 Solving -15 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + -1x = 0 + 15 Combine like terms: -15 + 15 = 0 0 + -1x = 0 + 15 -1x = 0 + 15 Combine like terms: 0 + 15 = 15 -1x = 15 Divide each side by '-1'. x = -15 Simplifying x = -15Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4Solution
x = {-15, 4}
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