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Simplifying 68 = -16t2 + 80t + 4 Reorder the terms: 68 = 4 + 80t + -16t2 Solving 68 = 4 + 80t + -16t2 Solving for variable 't'. Combine like terms: 68 + -4 = 64 64 + -80t + 16t2 = 4 + 80t + -16t2 + -4 + -80t + 16t2 Reorder the terms: 64 + -80t + 16t2 = 4 + -4 + 80t + -80t + -16t2 + 16t2 Combine like terms: 4 + -4 = 0 64 + -80t + 16t2 = 0 + 80t + -80t + -16t2 + 16t2 64 + -80t + 16t2 = 80t + -80t + -16t2 + 16t2 Combine like terms: 80t + -80t = 0 64 + -80t + 16t2 = 0 + -16t2 + 16t2 64 + -80t + 16t2 = -16t2 + 16t2 Combine like terms: -16t2 + 16t2 = 0 64 + -80t + 16t2 = 0 Factor out the Greatest Common Factor (GCF), '16'. 16(4 + -5t + t2) = 0 Factor a trinomial. 16((1 + -1t)(4 + -1t)) = 0 Ignore the factor 16.Subproblem 1
Set the factor '(1 + -1t)' equal to zero and attempt to solve: Simplifying 1 + -1t = 0 Solving 1 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -1t = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1t = 0 + -1 -1t = 0 + -1 Combine like terms: 0 + -1 = -1 -1t = -1 Divide each side by '-1'. t = 1 Simplifying t = 1Subproblem 2
Set the factor '(4 + -1t)' equal to zero and attempt to solve: Simplifying 4 + -1t = 0 Solving 4 + -1t = 0 Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1t = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1t = 0 + -4 -1t = 0 + -4 Combine like terms: 0 + -4 = -4 -1t = -4 Divide each side by '-1'. t = 4 Simplifying t = 4Solution
t = {1, 4}
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