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Simplifying 0 = -16t2 + 128t + 9 Reorder the terms: 0 = 9 + 128t + -16t2 Solving 0 = 9 + 128t + -16t2 Solving for variable 't'. Combine like terms: 0 + -9 = -9 -9 + -128t + 16t2 = 9 + 128t + -16t2 + -9 + -128t + 16t2 Reorder the terms: -9 + -128t + 16t2 = 9 + -9 + 128t + -128t + -16t2 + 16t2 Combine like terms: 9 + -9 = 0 -9 + -128t + 16t2 = 0 + 128t + -128t + -16t2 + 16t2 -9 + -128t + 16t2 = 128t + -128t + -16t2 + 16t2 Combine like terms: 128t + -128t = 0 -9 + -128t + 16t2 = 0 + -16t2 + 16t2 -9 + -128t + 16t2 = -16t2 + 16t2 Combine like terms: -16t2 + 16t2 = 0 -9 + -128t + 16t2 = 0 Begin completing the square. Divide all terms by 16 the coefficient of the squared term: Divide each side by '16'. -0.5625 + -8t + t2 = 0 Move the constant term to the right: Add '0.5625' to each side of the equation. -0.5625 + -8t + 0.5625 + t2 = 0 + 0.5625 Reorder the terms: -0.5625 + 0.5625 + -8t + t2 = 0 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + -8t + t2 = 0 + 0.5625 -8t + t2 = 0 + 0.5625 Combine like terms: 0 + 0.5625 = 0.5625 -8t + t2 = 0.5625 The t term is -8t. Take half its coefficient (-4). Square it (16) and add it to both sides. Add '16' to each side of the equation. -8t + 16 + t2 = 0.5625 + 16 Reorder the terms: 16 + -8t + t2 = 0.5625 + 16 Combine like terms: 0.5625 + 16 = 16.5625 16 + -8t + t2 = 16.5625 Factor a perfect square on the left side: (t + -4)(t + -4) = 16.5625 Calculate the square root of the right side: 4.069705149 Break this problem into two subproblems by setting (t + -4) equal to 4.069705149 and -4.069705149.Subproblem 1
t + -4 = 4.069705149 Simplifying t + -4 = 4.069705149 Reorder the terms: -4 + t = 4.069705149 Solving -4 + t = 4.069705149 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + t = 4.069705149 + 4 Combine like terms: -4 + 4 = 0 0 + t = 4.069705149 + 4 t = 4.069705149 + 4 Combine like terms: 4.069705149 + 4 = 8.069705149 t = 8.069705149 Simplifying t = 8.069705149Subproblem 2
t + -4 = -4.069705149 Simplifying t + -4 = -4.069705149 Reorder the terms: -4 + t = -4.069705149 Solving -4 + t = -4.069705149 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + t = -4.069705149 + 4 Combine like terms: -4 + 4 = 0 0 + t = -4.069705149 + 4 t = -4.069705149 + 4 Combine like terms: -4.069705149 + 4 = -0.069705149 t = -0.069705149 Simplifying t = -0.069705149Solution
The solution to the problem is based on the solutions from the subproblems. t = {8.069705149, -0.069705149}
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