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Simplifying 3x2 + 15xy + -42y2 = 0 Reorder the terms: 15xy + 3x2 + -42y2 = 0 Solving 15xy + 3x2 + -42y2 = 0 Solving for variable 'x'. Factor out the Greatest Common Factor (GCF), '3'. 3(5xy + x2 + -14y2) = 0 Factor a trinomial. 3((x + -2y)(x + 7y)) = 0 Ignore the factor 3.Subproblem 1
Set the factor '(x + -2y)' equal to zero and attempt to solve: Simplifying x + -2y = 0 Solving x + -2y = 0 Move all terms containing x to the left, all other terms to the right. Add '2y' to each side of the equation. x + -2y + 2y = 0 + 2y Combine like terms: -2y + 2y = 0 x + 0 = 0 + 2y x = 0 + 2y Remove the zero: x = 2y Simplifying x = 2ySubproblem 2
Set the factor '(x + 7y)' equal to zero and attempt to solve: Simplifying x + 7y = 0 Solving x + 7y = 0 Move all terms containing x to the left, all other terms to the right. Add '-7y' to each side of the equation. x + 7y + -7y = 0 + -7y Combine like terms: 7y + -7y = 0 x + 0 = 0 + -7y x = 0 + -7y Remove the zero: x = -7y Simplifying x = -7ySolution
x = {2y, -7y}
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