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Simplifying 0 = 5x(x + 7) Reorder the terms: 0 = 5x(7 + x) 0 = (7 * 5x + x * 5x) 0 = (35x + 5x2) Solving 0 = 35x + 5x2 Solving for variable 'x'. Remove the zero: -35x + -5x2 = 35x + 5x2 + -35x + -5x2 Reorder the terms: -35x + -5x2 = 35x + -35x + 5x2 + -5x2 Combine like terms: 35x + -35x = 0 -35x + -5x2 = 0 + 5x2 + -5x2 -35x + -5x2 = 5x2 + -5x2 Combine like terms: 5x2 + -5x2 = 0 -35x + -5x2 = 0 Factor out the Greatest Common Factor (GCF), '-5x'. -5x(7 + x) = 0 Ignore the factor -5.Subproblem 1
Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0Subproblem 2
Set the factor '(7 + x)' equal to zero and attempt to solve: Simplifying 7 + x = 0 Solving 7 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + x = 0 + -7 x = 0 + -7 Combine like terms: 0 + -7 = -7 x = -7 Simplifying x = -7Solution
x = {0, -7}
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