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Simplifying 0 = -8t2 + 20t + 10 Reorder the terms: 0 = 10 + 20t + -8t2 Solving 0 = 10 + 20t + -8t2 Solving for variable 't'. Combine like terms: 0 + -10 = -10 -10 + -20t + 8t2 = 10 + 20t + -8t2 + -10 + -20t + 8t2 Reorder the terms: -10 + -20t + 8t2 = 10 + -10 + 20t + -20t + -8t2 + 8t2 Combine like terms: 10 + -10 = 0 -10 + -20t + 8t2 = 0 + 20t + -20t + -8t2 + 8t2 -10 + -20t + 8t2 = 20t + -20t + -8t2 + 8t2 Combine like terms: 20t + -20t = 0 -10 + -20t + 8t2 = 0 + -8t2 + 8t2 -10 + -20t + 8t2 = -8t2 + 8t2 Combine like terms: -8t2 + 8t2 = 0 -10 + -20t + 8t2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-5 + -10t + 4t2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-5 + -10t + 4t2)' equal to zero and attempt to solve: Simplifying -5 + -10t + 4t2 = 0 Solving -5 + -10t + 4t2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -1.25 + -2.5t + t2 = 0 Move the constant term to the right: Add '1.25' to each side of the equation. -1.25 + -2.5t + 1.25 + t2 = 0 + 1.25 Reorder the terms: -1.25 + 1.25 + -2.5t + t2 = 0 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + -2.5t + t2 = 0 + 1.25 -2.5t + t2 = 0 + 1.25 Combine like terms: 0 + 1.25 = 1.25 -2.5t + t2 = 1.25 The t term is -2.5t. Take half its coefficient (-1.25). Square it (1.5625) and add it to both sides. Add '1.5625' to each side of the equation. -2.5t + 1.5625 + t2 = 1.25 + 1.5625 Reorder the terms: 1.5625 + -2.5t + t2 = 1.25 + 1.5625 Combine like terms: 1.25 + 1.5625 = 2.8125 1.5625 + -2.5t + t2 = 2.8125 Factor a perfect square on the left side: (t + -1.25)(t + -1.25) = 2.8125 Calculate the square root of the right side: 1.677050983 Break this problem into two subproblems by setting (t + -1.25) equal to 1.677050983 and -1.677050983.Subproblem 1
t + -1.25 = 1.677050983 Simplifying t + -1.25 = 1.677050983 Reorder the terms: -1.25 + t = 1.677050983 Solving -1.25 + t = 1.677050983 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = 1.677050983 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = 1.677050983 + 1.25 t = 1.677050983 + 1.25 Combine like terms: 1.677050983 + 1.25 = 2.927050983 t = 2.927050983 Simplifying t = 2.927050983Subproblem 2
t + -1.25 = -1.677050983 Simplifying t + -1.25 = -1.677050983 Reorder the terms: -1.25 + t = -1.677050983 Solving -1.25 + t = -1.677050983 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = -1.677050983 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = -1.677050983 + 1.25 t = -1.677050983 + 1.25 Combine like terms: -1.677050983 + 1.25 = -0.427050983 t = -0.427050983 Simplifying t = -0.427050983Solution
The solution to the problem is based on the solutions from the subproblems. t = {2.927050983, -0.427050983}Solution
t = {2.927050983, -0.427050983}
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