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Simplifying 8.45 = 13t + -5t2 Solving 8.45 = 13t + -5t2 Solving for variable 't'. Reorder the terms: 8.45 + -13t + 5t2 = 13t + -13t + -5t2 + 5t2 Combine like terms: 13t + -13t = 0 8.45 + -13t + 5t2 = 0 + -5t2 + 5t2 8.45 + -13t + 5t2 = -5t2 + 5t2 Combine like terms: -5t2 + 5t2 = 0 8.45 + -13t + 5t2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. 1.69 + -2.6t + t2 = 0 Move the constant term to the right: Add '-1.69' to each side of the equation. 1.69 + -2.6t + -1.69 + t2 = 0 + -1.69 Reorder the terms: 1.69 + -1.69 + -2.6t + t2 = 0 + -1.69 Combine like terms: 1.69 + -1.69 = 0.00 0.00 + -2.6t + t2 = 0 + -1.69 -2.6t + t2 = 0 + -1.69 Combine like terms: 0 + -1.69 = -1.69 -2.6t + t2 = -1.69 The t term is -2.6t. Take half its coefficient (-1.3). Square it (1.69) and add it to both sides. Add '1.69' to each side of the equation. -2.6t + 1.69 + t2 = -1.69 + 1.69 Reorder the terms: 1.69 + -2.6t + t2 = -1.69 + 1.69 Combine like terms: -1.69 + 1.69 = 0.00 1.69 + -2.6t + t2 = 0.00 Factor a perfect square on the left side: (t + -1.3)(t + -1.3) = 0.00 Calculate the square root of the right side: 0.00 Break this problem into two subproblems by setting (t + -1.3) equal to 0.00 and 0.00.Subproblem 1
t + -1.3 = 0.00 Simplifying t + -1.3 = 0.00 Reorder the terms: -1.3 + t = 0.00 Solving -1.3 + t = 0.00 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + t = 0.00 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + t = 0.00 + 1.3 t = 0.00 + 1.3 Combine like terms: 0.00 + 1.3 = 1.3 t = 1.3 Simplifying t = 1.3Subproblem 2
t + -1.3 = 0.00 Simplifying t + -1.3 = 0.00 Reorder the terms: -1.3 + t = 0.00 Solving -1.3 + t = 0.00 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.3' to each side of the equation. -1.3 + 1.3 + t = 0.00 + 1.3 Combine like terms: -1.3 + 1.3 = 0.0 0.0 + t = 0.00 + 1.3 t = 0.00 + 1.3 Combine like terms: 0.00 + 1.3 = 1.3 t = 1.3 Simplifying t = 1.3Solution
The solution to the problem is based on the solutions from the subproblems. t = {1.3, 1.3}
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