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Simplifying 20 = -16t2 + 64t + 4 Reorder the terms: 20 = 4 + 64t + -16t2 Solving 20 = 4 + 64t + -16t2 Solving for variable 't'. Combine like terms: 20 + -4 = 16 16 + -64t + 16t2 = 4 + 64t + -16t2 + -4 + -64t + 16t2 Reorder the terms: 16 + -64t + 16t2 = 4 + -4 + 64t + -64t + -16t2 + 16t2 Combine like terms: 4 + -4 = 0 16 + -64t + 16t2 = 0 + 64t + -64t + -16t2 + 16t2 16 + -64t + 16t2 = 64t + -64t + -16t2 + 16t2 Combine like terms: 64t + -64t = 0 16 + -64t + 16t2 = 0 + -16t2 + 16t2 16 + -64t + 16t2 = -16t2 + 16t2 Combine like terms: -16t2 + 16t2 = 0 16 + -64t + 16t2 = 0 Factor out the Greatest Common Factor (GCF), '16'. 16(1 + -4t + t2) = 0 Ignore the factor 16.Subproblem 1
Set the factor '(1 + -4t + t2)' equal to zero and attempt to solve: Simplifying 1 + -4t + t2 = 0 Solving 1 + -4t + t2 = 0 Begin completing the square. Move the constant term to the right: Add '-1' to each side of the equation. 1 + -4t + -1 + t2 = 0 + -1 Reorder the terms: 1 + -1 + -4t + t2 = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -4t + t2 = 0 + -1 -4t + t2 = 0 + -1 Combine like terms: 0 + -1 = -1 -4t + t2 = -1 The t term is -4t. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4t + 4 + t2 = -1 + 4 Reorder the terms: 4 + -4t + t2 = -1 + 4 Combine like terms: -1 + 4 = 3 4 + -4t + t2 = 3 Factor a perfect square on the left side: (t + -2)(t + -2) = 3 Calculate the square root of the right side: 1.732050808 Break this problem into two subproblems by setting (t + -2) equal to 1.732050808 and -1.732050808.Subproblem 1
t + -2 = 1.732050808 Simplifying t + -2 = 1.732050808 Reorder the terms: -2 + t = 1.732050808 Solving -2 + t = 1.732050808 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + t = 1.732050808 + 2 Combine like terms: -2 + 2 = 0 0 + t = 1.732050808 + 2 t = 1.732050808 + 2 Combine like terms: 1.732050808 + 2 = 3.732050808 t = 3.732050808 Simplifying t = 3.732050808Subproblem 2
t + -2 = -1.732050808 Simplifying t + -2 = -1.732050808 Reorder the terms: -2 + t = -1.732050808 Solving -2 + t = -1.732050808 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + t = -1.732050808 + 2 Combine like terms: -2 + 2 = 0 0 + t = -1.732050808 + 2 t = -1.732050808 + 2 Combine like terms: -1.732050808 + 2 = 0.267949192 t = 0.267949192 Simplifying t = 0.267949192Solution
The solution to the problem is based on the solutions from the subproblems. t = {3.732050808, 0.267949192}Solution
t = {3.732050808, 0.267949192}
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