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Simplifying 0 = 5t2 + -7t + -2 Reorder the terms: 0 = -2 + -7t + 5t2 Solving 0 = -2 + -7t + 5t2 Solving for variable 't'. Combine like terms: 0 + 2 = 2 2 + 7t + -5t2 = -2 + -7t + 5t2 + 2 + 7t + -5t2 Reorder the terms: 2 + 7t + -5t2 = -2 + 2 + -7t + 7t + 5t2 + -5t2 Combine like terms: -2 + 2 = 0 2 + 7t + -5t2 = 0 + -7t + 7t + 5t2 + -5t2 2 + 7t + -5t2 = -7t + 7t + 5t2 + -5t2 Combine like terms: -7t + 7t = 0 2 + 7t + -5t2 = 0 + 5t2 + -5t2 2 + 7t + -5t2 = 5t2 + -5t2 Combine like terms: 5t2 + -5t2 = 0 2 + 7t + -5t2 = 0 Begin completing the square. Divide all terms by -5 the coefficient of the squared term: Divide each side by '-5'. -0.4 + -1.4t + t2 = 0 Move the constant term to the right: Add '0.4' to each side of the equation. -0.4 + -1.4t + 0.4 + t2 = 0 + 0.4 Reorder the terms: -0.4 + 0.4 + -1.4t + t2 = 0 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + -1.4t + t2 = 0 + 0.4 -1.4t + t2 = 0 + 0.4 Combine like terms: 0 + 0.4 = 0.4 -1.4t + t2 = 0.4 The t term is -1.4t. Take half its coefficient (-0.7). Square it (0.49) and add it to both sides. Add '0.49' to each side of the equation. -1.4t + 0.49 + t2 = 0.4 + 0.49 Reorder the terms: 0.49 + -1.4t + t2 = 0.4 + 0.49 Combine like terms: 0.4 + 0.49 = 0.89 0.49 + -1.4t + t2 = 0.89 Factor a perfect square on the left side: (t + -0.7)(t + -0.7) = 0.89 Calculate the square root of the right side: 0.943398113 Break this problem into two subproblems by setting (t + -0.7) equal to 0.943398113 and -0.943398113.Subproblem 1
t + -0.7 = 0.943398113 Simplifying t + -0.7 = 0.943398113 Reorder the terms: -0.7 + t = 0.943398113 Solving -0.7 + t = 0.943398113 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + t = 0.943398113 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + t = 0.943398113 + 0.7 t = 0.943398113 + 0.7 Combine like terms: 0.943398113 + 0.7 = 1.643398113 t = 1.643398113 Simplifying t = 1.643398113Subproblem 2
t + -0.7 = -0.943398113 Simplifying t + -0.7 = -0.943398113 Reorder the terms: -0.7 + t = -0.943398113 Solving -0.7 + t = -0.943398113 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.7' to each side of the equation. -0.7 + 0.7 + t = -0.943398113 + 0.7 Combine like terms: -0.7 + 0.7 = 0.0 0.0 + t = -0.943398113 + 0.7 t = -0.943398113 + 0.7 Combine like terms: -0.943398113 + 0.7 = -0.243398113 t = -0.243398113 Simplifying t = -0.243398113Solution
The solution to the problem is based on the solutions from the subproblems. t = {1.643398113, -0.243398113}
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