40=5+50t-16t^2

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Solution for 40=5+50t-16t^2 equation:


Simplifying
40 = 5 + 50t + -16t2

Solving
40 = 5 + 50t + -16t2

Solving for variable 't'.

Combine like terms: 40 + -5 = 35
35 + -50t + 16t2 = 5 + 50t + -16t2 + -5 + -50t + 16t2

Reorder the terms:
35 + -50t + 16t2 = 5 + -5 + 50t + -50t + -16t2 + 16t2

Combine like terms: 5 + -5 = 0
35 + -50t + 16t2 = 0 + 50t + -50t + -16t2 + 16t2
35 + -50t + 16t2 = 50t + -50t + -16t2 + 16t2

Combine like terms: 50t + -50t = 0
35 + -50t + 16t2 = 0 + -16t2 + 16t2
35 + -50t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
35 + -50t + 16t2 = 0

Begin completing the square.  Divide all terms by
16 the coefficient of the squared term: 

Divide each side by '16'.
2.1875 + -3.125t + t2 = 0

Move the constant term to the right:

Add '-2.1875' to each side of the equation.
2.1875 + -3.125t + -2.1875 + t2 = 0 + -2.1875

Reorder the terms:
2.1875 + -2.1875 + -3.125t + t2 = 0 + -2.1875

Combine like terms: 2.1875 + -2.1875 = 0.0000
0.0000 + -3.125t + t2 = 0 + -2.1875
-3.125t + t2 = 0 + -2.1875

Combine like terms: 0 + -2.1875 = -2.1875
-3.125t + t2 = -2.1875

The t term is -3.125t.  Take half its coefficient (-1.5625).
Square it (2.44140625) and add it to both sides.

Add '2.44140625' to each side of the equation.
-3.125t + 2.44140625 + t2 = -2.1875 + 2.44140625

Reorder the terms:
2.44140625 + -3.125t + t2 = -2.1875 + 2.44140625

Combine like terms: -2.1875 + 2.44140625 = 0.25390625
2.44140625 + -3.125t + t2 = 0.25390625

Factor a perfect square on the left side:
(t + -1.5625)(t + -1.5625) = 0.25390625

Calculate the square root of the right side: 0.503891109

Break this problem into two subproblems by setting 
(t + -1.5625) equal to 0.503891109 and -0.503891109.

Subproblem 1

t + -1.5625 = 0.503891109 Simplifying t + -1.5625 = 0.503891109 Reorder the terms: -1.5625 + t = 0.503891109 Solving -1.5625 + t = 0.503891109 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.5625' to each side of the equation. -1.5625 + 1.5625 + t = 0.503891109 + 1.5625 Combine like terms: -1.5625 + 1.5625 = 0.0000 0.0000 + t = 0.503891109 + 1.5625 t = 0.503891109 + 1.5625 Combine like terms: 0.503891109 + 1.5625 = 2.066391109 t = 2.066391109 Simplifying t = 2.066391109

Subproblem 2

t + -1.5625 = -0.503891109 Simplifying t + -1.5625 = -0.503891109 Reorder the terms: -1.5625 + t = -0.503891109 Solving -1.5625 + t = -0.503891109 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.5625' to each side of the equation. -1.5625 + 1.5625 + t = -0.503891109 + 1.5625 Combine like terms: -1.5625 + 1.5625 = 0.0000 0.0000 + t = -0.503891109 + 1.5625 t = -0.503891109 + 1.5625 Combine like terms: -0.503891109 + 1.5625 = 1.058608891 t = 1.058608891 Simplifying t = 1.058608891

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.066391109, 1.058608891}

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