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Simplifying -4.9t2 + 10t + 16 = 15 Reorder the terms: 16 + 10t + -4.9t2 = 15 Solving 16 + 10t + -4.9t2 = 15 Solving for variable 't'. Reorder the terms: 16 + -15 + 10t + -4.9t2 = 15 + -15 Combine like terms: 16 + -15 = 1 1 + 10t + -4.9t2 = 15 + -15 Combine like terms: 15 + -15 = 0 1 + 10t + -4.9t2 = 0 Begin completing the square. Divide all terms by -4.9 the coefficient of the squared term: Divide each side by '-4.9'. -0.2040816327 + -2.040816327t + t2 = 0 Move the constant term to the right: Add '0.2040816327' to each side of the equation. -0.2040816327 + -2.040816327t + 0.2040816327 + t2 = 0 + 0.2040816327 Reorder the terms: -0.2040816327 + 0.2040816327 + -2.040816327t + t2 = 0 + 0.2040816327 Combine like terms: -0.2040816327 + 0.2040816327 = 0.0000000000 0.0000000000 + -2.040816327t + t2 = 0 + 0.2040816327 -2.040816327t + t2 = 0 + 0.2040816327 Combine like terms: 0 + 0.2040816327 = 0.2040816327 -2.040816327t + t2 = 0.2040816327 The t term is -2.040816327t. Take half its coefficient (-1.020408164). Square it (1.041232821) and add it to both sides. Add '1.041232821' to each side of the equation. -2.040816327t + 1.041232821 + t2 = 0.2040816327 + 1.041232821 Reorder the terms: 1.041232821 + -2.040816327t + t2 = 0.2040816327 + 1.041232821 Combine like terms: 0.2040816327 + 1.041232821 = 1.2453144537 1.041232821 + -2.040816327t + t2 = 1.2453144537 Factor a perfect square on the left side: (t + -1.020408164)(t + -1.020408164) = 1.2453144537 Calculate the square root of the right side: 1.115936581 Break this problem into two subproblems by setting (t + -1.020408164) equal to 1.115936581 and -1.115936581.Subproblem 1
t + -1.020408164 = 1.115936581 Simplifying t + -1.020408164 = 1.115936581 Reorder the terms: -1.020408164 + t = 1.115936581 Solving -1.020408164 + t = 1.115936581 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.020408164' to each side of the equation. -1.020408164 + 1.020408164 + t = 1.115936581 + 1.020408164 Combine like terms: -1.020408164 + 1.020408164 = 0.000000000 0.000000000 + t = 1.115936581 + 1.020408164 t = 1.115936581 + 1.020408164 Combine like terms: 1.115936581 + 1.020408164 = 2.136344745 t = 2.136344745 Simplifying t = 2.136344745Subproblem 2
t + -1.020408164 = -1.115936581 Simplifying t + -1.020408164 = -1.115936581 Reorder the terms: -1.020408164 + t = -1.115936581 Solving -1.020408164 + t = -1.115936581 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.020408164' to each side of the equation. -1.020408164 + 1.020408164 + t = -1.115936581 + 1.020408164 Combine like terms: -1.020408164 + 1.020408164 = 0.000000000 0.000000000 + t = -1.115936581 + 1.020408164 t = -1.115936581 + 1.020408164 Combine like terms: -1.115936581 + 1.020408164 = -0.095528417 t = -0.095528417 Simplifying t = -0.095528417Solution
The solution to the problem is based on the solutions from the subproblems. t = {2.136344745, -0.095528417}
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