0=-16t^2+20t+40

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Solution for 0=-16t^2+20t+40 equation:


Simplifying
0 = -16t2 + 20t + 40

Reorder the terms:
0 = 40 + 20t + -16t2

Solving
0 = 40 + 20t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -40 = -40
-40 + -20t + 16t2 = 40 + 20t + -16t2 + -40 + -20t + 16t2

Reorder the terms:
-40 + -20t + 16t2 = 40 + -40 + 20t + -20t + -16t2 + 16t2

Combine like terms: 40 + -40 = 0
-40 + -20t + 16t2 = 0 + 20t + -20t + -16t2 + 16t2
-40 + -20t + 16t2 = 20t + -20t + -16t2 + 16t2

Combine like terms: 20t + -20t = 0
-40 + -20t + 16t2 = 0 + -16t2 + 16t2
-40 + -20t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-40 + -20t + 16t2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-10 + -5t + 4t2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-10 + -5t + 4t2)' equal to zero and attempt to solve: Simplifying -10 + -5t + 4t2 = 0 Solving -10 + -5t + 4t2 = 0 Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -2.5 + -1.25t + t2 = 0 Move the constant term to the right: Add '2.5' to each side of the equation. -2.5 + -1.25t + 2.5 + t2 = 0 + 2.5 Reorder the terms: -2.5 + 2.5 + -1.25t + t2 = 0 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + -1.25t + t2 = 0 + 2.5 -1.25t + t2 = 0 + 2.5 Combine like terms: 0 + 2.5 = 2.5 -1.25t + t2 = 2.5 The t term is -1.25t. Take half its coefficient (-0.625). Square it (0.390625) and add it to both sides. Add '0.390625' to each side of the equation. -1.25t + 0.390625 + t2 = 2.5 + 0.390625 Reorder the terms: 0.390625 + -1.25t + t2 = 2.5 + 0.390625 Combine like terms: 2.5 + 0.390625 = 2.890625 0.390625 + -1.25t + t2 = 2.890625 Factor a perfect square on the left side: (t + -0.625)(t + -0.625) = 2.890625 Calculate the square root of the right side: 1.700183814 Break this problem into two subproblems by setting (t + -0.625) equal to 1.700183814 and -1.700183814.

Subproblem 1

t + -0.625 = 1.700183814 Simplifying t + -0.625 = 1.700183814 Reorder the terms: -0.625 + t = 1.700183814 Solving -0.625 + t = 1.700183814 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + t = 1.700183814 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + t = 1.700183814 + 0.625 t = 1.700183814 + 0.625 Combine like terms: 1.700183814 + 0.625 = 2.325183814 t = 2.325183814 Simplifying t = 2.325183814

Subproblem 2

t + -0.625 = -1.700183814 Simplifying t + -0.625 = -1.700183814 Reorder the terms: -0.625 + t = -1.700183814 Solving -0.625 + t = -1.700183814 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.625' to each side of the equation. -0.625 + 0.625 + t = -1.700183814 + 0.625 Combine like terms: -0.625 + 0.625 = 0.000 0.000 + t = -1.700183814 + 0.625 t = -1.700183814 + 0.625 Combine like terms: -1.700183814 + 0.625 = -1.075183814 t = -1.075183814 Simplifying t = -1.075183814

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.325183814, -1.075183814}

Solution

t = {2.325183814, -1.075183814}

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