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Simplifying -5t2 + 20t + 2 = 0 Reorder the terms: 2 + 20t + -5t2 = 0 Solving 2 + 20t + -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'. -0.4 + -4t + t2 = 0 Move the constant term to the right: Add '0.4' to each side of the equation. -0.4 + -4t + 0.4 + t2 = 0 + 0.4 Reorder the terms: -0.4 + 0.4 + -4t + t2 = 0 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + -4t + t2 = 0 + 0.4 -4t + t2 = 0 + 0.4 Combine like terms: 0 + 0.4 = 0.4 -4t + t2 = 0.4 The t term is -4t. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4t + 4 + t2 = 0.4 + 4 Reorder the terms: 4 + -4t + t2 = 0.4 + 4 Combine like terms: 0.4 + 4 = 4.4 4 + -4t + t2 = 4.4 Factor a perfect square on the left side: (t + -2)(t + -2) = 4.4 Calculate the square root of the right side: 2.097617696 Break this problem into two subproblems by setting (t + -2) equal to 2.097617696 and -2.097617696.Subproblem 1
t + -2 = 2.097617696 Simplifying t + -2 = 2.097617696 Reorder the terms: -2 + t = 2.097617696 Solving -2 + t = 2.097617696 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + t = 2.097617696 + 2 Combine like terms: -2 + 2 = 0 0 + t = 2.097617696 + 2 t = 2.097617696 + 2 Combine like terms: 2.097617696 + 2 = 4.097617696 t = 4.097617696 Simplifying t = 4.097617696Subproblem 2
t + -2 = -2.097617696 Simplifying t + -2 = -2.097617696 Reorder the terms: -2 + t = -2.097617696 Solving -2 + t = -2.097617696 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + t = -2.097617696 + 2 Combine like terms: -2 + 2 = 0 0 + t = -2.097617696 + 2 t = -2.097617696 + 2 Combine like terms: -2.097617696 + 2 = -0.097617696 t = -0.097617696 Simplifying t = -0.097617696Solution
The solution to the problem is based on the solutions from the subproblems. t = {4.097617696, -0.097617696}
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