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Simplifying 20t2 + -43t + 21 = 0 Reorder the terms: 21 + -43t + 20t2 = 0 Solving 21 + -43t + 20t2 = 0 Solving for variable 't'. Factor a trinomial. (3 + -4t)(7 + -5t) = 0Subproblem 1
Set the factor '(3 + -4t)' equal to zero and attempt to solve: Simplifying 3 + -4t = 0 Solving 3 + -4t = 0 Move all terms containing t to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -4t = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -4t = 0 + -3 -4t = 0 + -3 Combine like terms: 0 + -3 = -3 -4t = -3 Divide each side by '-4'. t = 0.75 Simplifying t = 0.75Subproblem 2
Set the factor '(7 + -5t)' equal to zero and attempt to solve: Simplifying 7 + -5t = 0 Solving 7 + -5t = 0 Move all terms containing t to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -5t = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -5t = 0 + -7 -5t = 0 + -7 Combine like terms: 0 + -7 = -7 -5t = -7 Divide each side by '-5'. t = 1.4 Simplifying t = 1.4Solution
t = {0.75, 1.4}
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