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Simplifying t2 + -20t + 7 = 0 Reorder the terms: 7 + -20t + t2 = 0 Solving 7 + -20t + t2 = 0 Solving for variable 't'. Begin completing the square. Move the constant term to the right: Add '-7' to each side of the equation. 7 + -20t + -7 + t2 = 0 + -7 Reorder the terms: 7 + -7 + -20t + t2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -20t + t2 = 0 + -7 -20t + t2 = 0 + -7 Combine like terms: 0 + -7 = -7 -20t + t2 = -7 The t term is -20t. Take half its coefficient (-10). Square it (100) and add it to both sides. Add '100' to each side of the equation. -20t + 100 + t2 = -7 + 100 Reorder the terms: 100 + -20t + t2 = -7 + 100 Combine like terms: -7 + 100 = 93 100 + -20t + t2 = 93 Factor a perfect square on the left side: (t + -10)(t + -10) = 93 Calculate the square root of the right side: 9.643650761 Break this problem into two subproblems by setting (t + -10) equal to 9.643650761 and -9.643650761.Subproblem 1
t + -10 = 9.643650761 Simplifying t + -10 = 9.643650761 Reorder the terms: -10 + t = 9.643650761 Solving -10 + t = 9.643650761 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = 9.643650761 + 10 Combine like terms: -10 + 10 = 0 0 + t = 9.643650761 + 10 t = 9.643650761 + 10 Combine like terms: 9.643650761 + 10 = 19.643650761 t = 19.643650761 Simplifying t = 19.643650761Subproblem 2
t + -10 = -9.643650761 Simplifying t + -10 = -9.643650761 Reorder the terms: -10 + t = -9.643650761 Solving -10 + t = -9.643650761 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = -9.643650761 + 10 Combine like terms: -10 + 10 = 0 0 + t = -9.643650761 + 10 t = -9.643650761 + 10 Combine like terms: -9.643650761 + 10 = 0.356349239 t = 0.356349239 Simplifying t = 0.356349239Solution
The solution to the problem is based on the solutions from the subproblems. t = {19.643650761, 0.356349239}
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