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Simplifying 2t2 + 18t + 20 = 0 Reorder the terms: 20 + 18t + 2t2 = 0 Solving 20 + 18t + 2t2 = 0 Solving for variable 't'. Factor out the Greatest Common Factor (GCF), '2'. 2(10 + 9t + t2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(10 + 9t + t2)' equal to zero and attempt to solve: Simplifying 10 + 9t + t2 = 0 Solving 10 + 9t + t2 = 0 Begin completing the square. Move the constant term to the right: Add '-10' to each side of the equation. 10 + 9t + -10 + t2 = 0 + -10 Reorder the terms: 10 + -10 + 9t + t2 = 0 + -10 Combine like terms: 10 + -10 = 0 0 + 9t + t2 = 0 + -10 9t + t2 = 0 + -10 Combine like terms: 0 + -10 = -10 9t + t2 = -10 The t term is 9t. Take half its coefficient (4.5). Square it (20.25) and add it to both sides. Add '20.25' to each side of the equation. 9t + 20.25 + t2 = -10 + 20.25 Reorder the terms: 20.25 + 9t + t2 = -10 + 20.25 Combine like terms: -10 + 20.25 = 10.25 20.25 + 9t + t2 = 10.25 Factor a perfect square on the left side: (t + 4.5)(t + 4.5) = 10.25 Calculate the square root of the right side: 3.201562119 Break this problem into two subproblems by setting (t + 4.5) equal to 3.201562119 and -3.201562119.Subproblem 1
t + 4.5 = 3.201562119 Simplifying t + 4.5 = 3.201562119 Reorder the terms: 4.5 + t = 3.201562119 Solving 4.5 + t = 3.201562119 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + t = 3.201562119 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + t = 3.201562119 + -4.5 t = 3.201562119 + -4.5 Combine like terms: 3.201562119 + -4.5 = -1.298437881 t = -1.298437881 Simplifying t = -1.298437881Subproblem 2
t + 4.5 = -3.201562119 Simplifying t + 4.5 = -3.201562119 Reorder the terms: 4.5 + t = -3.201562119 Solving 4.5 + t = -3.201562119 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + t = -3.201562119 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + t = -3.201562119 + -4.5 t = -3.201562119 + -4.5 Combine like terms: -3.201562119 + -4.5 = -7.701562119 t = -7.701562119 Simplifying t = -7.701562119Solution
The solution to the problem is based on the solutions from the subproblems. t = {-1.298437881, -7.701562119}Solution
t = {-1.298437881, -7.701562119}
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