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Simplifying 21y3 + -15y2 + -54y = 0 Reorder the terms: -54y + -15y2 + 21y3 = 0 Solving -54y + -15y2 + 21y3 = 0 Solving for variable 'y'. Factor out the Greatest Common Factor (GCF), '3y'. 3y(-18 + -5y + 7y2) = 0 Factor a trinomial. 3y((-9 + -7y)(2 + -1y)) = 0 Ignore the factor 3.Subproblem 1
Set the factor 'y' equal to zero and attempt to solve: Simplifying y = 0 Solving y = 0 Move all terms containing y to the left, all other terms to the right. Simplifying y = 0Subproblem 2
Set the factor '(-9 + -7y)' equal to zero and attempt to solve: Simplifying -9 + -7y = 0 Solving -9 + -7y = 0 Move all terms containing y to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + -7y = 0 + 9 Combine like terms: -9 + 9 = 0 0 + -7y = 0 + 9 -7y = 0 + 9 Combine like terms: 0 + 9 = 9 -7y = 9 Divide each side by '-7'. y = -1.285714286 Simplifying y = -1.285714286Subproblem 3
Set the factor '(2 + -1y)' equal to zero and attempt to solve: Simplifying 2 + -1y = 0 Solving 2 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1y = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1y = 0 + -2 -1y = 0 + -2 Combine like terms: 0 + -2 = -2 -1y = -2 Divide each side by '-1'. y = 2 Simplifying y = 2Solution
y = {0, -1.285714286, 2}
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