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Simplifying 0 = 6x2 + 15x + -75 Reorder the terms: 0 = -75 + 15x + 6x2 Solving 0 = -75 + 15x + 6x2 Solving for variable 'x'. Combine like terms: 0 + 75 = 75 75 + -15x + -6x2 = -75 + 15x + 6x2 + 75 + -15x + -6x2 Reorder the terms: 75 + -15x + -6x2 = -75 + 75 + 15x + -15x + 6x2 + -6x2 Combine like terms: -75 + 75 = 0 75 + -15x + -6x2 = 0 + 15x + -15x + 6x2 + -6x2 75 + -15x + -6x2 = 15x + -15x + 6x2 + -6x2 Combine like terms: 15x + -15x = 0 75 + -15x + -6x2 = 0 + 6x2 + -6x2 75 + -15x + -6x2 = 6x2 + -6x2 Combine like terms: 6x2 + -6x2 = 0 75 + -15x + -6x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(25 + -5x + -2x2) = 0 Factor a trinomial. 3((5 + -2x)(5 + x)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(5 + -2x)' equal to zero and attempt to solve: Simplifying 5 + -2x = 0 Solving 5 + -2x = 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 + -2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2x = 0 + -5 -2x = 0 + -5 Combine like terms: 0 + -5 = -5 -2x = -5 Divide each side by '-2'. x = 2.5 Simplifying x = 2.5Subproblem 2
Set the factor '(5 + x)' equal to zero and attempt to solve: Simplifying 5 + x = 0 Solving 5 + x = 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 + x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + x = 0 + -5 x = 0 + -5 Combine like terms: 0 + -5 = -5 x = -5 Simplifying x = -5Solution
x = {2.5, -5}
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