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Simplifying 60 = -16t2 + 5t + 105 Reorder the terms: 60 = 105 + 5t + -16t2 Solving 60 = 105 + 5t + -16t2 Solving for variable 't'. Combine like terms: 60 + -105 = -45 -45 + -5t + 16t2 = 105 + 5t + -16t2 + -105 + -5t + 16t2 Reorder the terms: -45 + -5t + 16t2 = 105 + -105 + 5t + -5t + -16t2 + 16t2 Combine like terms: 105 + -105 = 0 -45 + -5t + 16t2 = 0 + 5t + -5t + -16t2 + 16t2 -45 + -5t + 16t2 = 5t + -5t + -16t2 + 16t2 Combine like terms: 5t + -5t = 0 -45 + -5t + 16t2 = 0 + -16t2 + 16t2 -45 + -5t + 16t2 = -16t2 + 16t2 Combine like terms: -16t2 + 16t2 = 0 -45 + -5t + 16t2 = 0 Begin completing the square. Divide all terms by 16 the coefficient of the squared term: Divide each side by '16'. -2.8125 + -0.3125t + t2 = 0 Move the constant term to the right: Add '2.8125' to each side of the equation. -2.8125 + -0.3125t + 2.8125 + t2 = 0 + 2.8125 Reorder the terms: -2.8125 + 2.8125 + -0.3125t + t2 = 0 + 2.8125 Combine like terms: -2.8125 + 2.8125 = 0.0000 0.0000 + -0.3125t + t2 = 0 + 2.8125 -0.3125t + t2 = 0 + 2.8125 Combine like terms: 0 + 2.8125 = 2.8125 -0.3125t + t2 = 2.8125 The t term is -0.3125t. Take half its coefficient (-0.15625). Square it (0.0244140625) and add it to both sides. Add '0.0244140625' to each side of the equation. -0.3125t + 0.0244140625 + t2 = 2.8125 + 0.0244140625 Reorder the terms: 0.0244140625 + -0.3125t + t2 = 2.8125 + 0.0244140625 Combine like terms: 2.8125 + 0.0244140625 = 2.8369140625 0.0244140625 + -0.3125t + t2 = 2.8369140625 Factor a perfect square on the left side: (t + -0.15625)(t + -0.15625) = 2.8369140625 Calculate the square root of the right side: 1.684314122 Break this problem into two subproblems by setting (t + -0.15625) equal to 1.684314122 and -1.684314122.Subproblem 1
t + -0.15625 = 1.684314122 Simplifying t + -0.15625 = 1.684314122 Reorder the terms: -0.15625 + t = 1.684314122 Solving -0.15625 + t = 1.684314122 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.15625' to each side of the equation. -0.15625 + 0.15625 + t = 1.684314122 + 0.15625 Combine like terms: -0.15625 + 0.15625 = 0.00000 0.00000 + t = 1.684314122 + 0.15625 t = 1.684314122 + 0.15625 Combine like terms: 1.684314122 + 0.15625 = 1.840564122 t = 1.840564122 Simplifying t = 1.840564122Subproblem 2
t + -0.15625 = -1.684314122 Simplifying t + -0.15625 = -1.684314122 Reorder the terms: -0.15625 + t = -1.684314122 Solving -0.15625 + t = -1.684314122 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.15625' to each side of the equation. -0.15625 + 0.15625 + t = -1.684314122 + 0.15625 Combine like terms: -0.15625 + 0.15625 = 0.00000 0.00000 + t = -1.684314122 + 0.15625 t = -1.684314122 + 0.15625 Combine like terms: -1.684314122 + 0.15625 = -1.528064122 t = -1.528064122 Simplifying t = -1.528064122Solution
The solution to the problem is based on the solutions from the subproblems. t = {1.840564122, -1.528064122}
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