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Simplifying 7x2 + 10x + -4 = x2 + -15 + 15 Reorder the terms: -4 + 10x + 7x2 = x2 + -15 + 15 Reorder the terms: -4 + 10x + 7x2 = -15 + 15 + x2 Combine like terms: -15 + 15 = 0 -4 + 10x + 7x2 = 0 + x2 -4 + 10x + 7x2 = x2 Solving -4 + 10x + 7x2 = x2 Solving for variable 'x'. Combine like terms: 7x2 + -1x2 = 6x2 -4 + 10x + 6x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4 + 10x + 6x2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-2 + 5x + 3x2) = 0 Factor a trinomial. 2((-2 + -1x)(1 + -3x)) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2Subproblem 2
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 = 0.3333333333Solution
x = {-2, 0.3333333333}
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