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Simplifying 5t2 + 9t + -15 = 0 Reorder the terms: -15 + 9t + 5t2 = 0 Solving -15 + 9t + 5t2 = 0 Solving for variable 't'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -3 + 1.8t + t2 = 0 Move the constant term to the right: Add '3' to each side of the equation. -3 + 1.8t + 3 + t2 = 0 + 3 Reorder the terms: -3 + 3 + 1.8t + t2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 1.8t + t2 = 0 + 3 1.8t + t2 = 0 + 3 Combine like terms: 0 + 3 = 3 1.8t + t2 = 3 The t term is 1.8t. Take half its coefficient (0.9). Square it (0.81) and add it to both sides. Add '0.81' to each side of the equation. 1.8t + 0.81 + t2 = 3 + 0.81 Reorder the terms: 0.81 + 1.8t + t2 = 3 + 0.81 Combine like terms: 3 + 0.81 = 3.81 0.81 + 1.8t + t2 = 3.81 Factor a perfect square on the left side: (t + 0.9)(t + 0.9) = 3.81 Calculate the square root of the right side: 1.95192213 Break this problem into two subproblems by setting (t + 0.9) equal to 1.95192213 and -1.95192213.Subproblem 1
t + 0.9 = 1.95192213 Simplifying t + 0.9 = 1.95192213 Reorder the terms: 0.9 + t = 1.95192213 Solving 0.9 + t = 1.95192213 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + t = 1.95192213 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + t = 1.95192213 + -0.9 t = 1.95192213 + -0.9 Combine like terms: 1.95192213 + -0.9 = 1.05192213 t = 1.05192213 Simplifying t = 1.05192213Subproblem 2
t + 0.9 = -1.95192213 Simplifying t + 0.9 = -1.95192213 Reorder the terms: 0.9 + t = -1.95192213 Solving 0.9 + t = -1.95192213 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + t = -1.95192213 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + t = -1.95192213 + -0.9 t = -1.95192213 + -0.9 Combine like terms: -1.95192213 + -0.9 = -2.85192213 t = -2.85192213 Simplifying t = -2.85192213Solution
The solution to the problem is based on the solutions from the subproblems. t = {1.05192213, -2.85192213}
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