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Simplifying 5y2 + 5y = 100 Reorder the terms: 5y + 5y2 = 100 Solving 5y + 5y2 = 100 Solving for variable 'y'. Reorder the terms: -100 + 5y + 5y2 = 100 + -100 Combine like terms: 100 + -100 = 0 -100 + 5y + 5y2 = 0 Factor out the Greatest Common Factor (GCF), '5'. 5(-20 + y + y2) = 0 Factor a trinomial. 5((-5 + -1y)(4 + -1y)) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-5 + -1y)' equal to zero and attempt to solve: Simplifying -5 + -1y = 0 Solving -5 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1y = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1y = 0 + 5 -1y = 0 + 5 Combine like terms: 0 + 5 = 5 -1y = 5 Divide each side by '-1'. y = -5 Simplifying y = -5Subproblem 2
Set the factor '(4 + -1y)' equal to zero and attempt to solve: Simplifying 4 + -1y = 0 Solving 4 + -1y = 0 Move all terms containing y to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1y = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1y = 0 + -4 -1y = 0 + -4 Combine like terms: 0 + -4 = -4 -1y = -4 Divide each side by '-1'. y = 4 Simplifying y = 4Solution
y = {-5, 4}
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