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Simplifying 9x2 + -42x + 49 = 64 Reorder the terms: 49 + -42x + 9x2 = 64 Solving 49 + -42x + 9x2 = 64 Solving for variable 'x'. Reorder the terms: 49 + -64 + -42x + 9x2 = 64 + -64 Combine like terms: 49 + -64 = -15 -15 + -42x + 9x2 = 64 + -64 Combine like terms: 64 + -64 = 0 -15 + -42x + 9x2 = 0 Factor out the Greatest Common Factor (GCF), '3'. 3(-5 + -14x + 3x2) = 0 Factor a trinomial. 3((-1 + -3x)(5 + -1x)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(-1 + -3x)' equal to zero and attempt to solve: Simplifying -1 + -3x = 0 Solving -1 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -3x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -3x = 0 + 1 -3x = 0 + 1 Combine like terms: 0 + 1 = 1 -3x = 1 Divide each side by '-3'. x = -0.3333333333 Simplifying x = -0.3333333333Subproblem 2
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 = 5Solution
x = {-0.3333333333, 5}
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