125=-16t^2+125t

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Solution for 125=-16t^2+125t equation:


Simplifying
125 = -16t2 + 125t

Reorder the terms:
125 = 125t + -16t2

Solving
125 = 125t + -16t2

Solving for variable 't'.

Reorder the terms:
125 + -125t + 16t2 = 125t + -125t + -16t2 + 16t2

Combine like terms: 125t + -125t = 0
125 + -125t + 16t2 = 0 + -16t2 + 16t2
125 + -125t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
125 + -125t + 16t2 = 0

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

Divide each side by '16'.
7.8125 + -7.8125t + t2 = 0

Move the constant term to the right:

Add '-7.8125' to each side of the equation.
7.8125 + -7.8125t + -7.8125 + t2 = 0 + -7.8125

Reorder the terms:
7.8125 + -7.8125 + -7.8125t + t2 = 0 + -7.8125

Combine like terms: 7.8125 + -7.8125 = 0.0000
0.0000 + -7.8125t + t2 = 0 + -7.8125
-7.8125t + t2 = 0 + -7.8125

Combine like terms: 0 + -7.8125 = -7.8125
-7.8125t + t2 = -7.8125

The t term is -7.8125t.  Take half its coefficient (-3.90625).
Square it (15.25878906) and add it to both sides.

Add '15.25878906' to each side of the equation.
-7.8125t + 15.25878906 + t2 = -7.8125 + 15.25878906

Reorder the terms:
15.25878906 + -7.8125t + t2 = -7.8125 + 15.25878906

Combine like terms: -7.8125 + 15.25878906 = 7.44628906
15.25878906 + -7.8125t + t2 = 7.44628906

Factor a perfect square on the left side:
(t + -3.90625)(t + -3.90625) = 7.44628906

Calculate the square root of the right side: 2.728788937

Break this problem into two subproblems by setting 
(t + -3.90625) equal to 2.728788937 and -2.728788937.

Subproblem 1

t + -3.90625 = 2.728788937 Simplifying t + -3.90625 = 2.728788937 Reorder the terms: -3.90625 + t = 2.728788937 Solving -3.90625 + t = 2.728788937 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.90625' to each side of the equation. -3.90625 + 3.90625 + t = 2.728788937 + 3.90625 Combine like terms: -3.90625 + 3.90625 = 0.00000 0.00000 + t = 2.728788937 + 3.90625 t = 2.728788937 + 3.90625 Combine like terms: 2.728788937 + 3.90625 = 6.635038937 t = 6.635038937 Simplifying t = 6.635038937

Subproblem 2

t + -3.90625 = -2.728788937 Simplifying t + -3.90625 = -2.728788937 Reorder the terms: -3.90625 + t = -2.728788937 Solving -3.90625 + t = -2.728788937 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.90625' to each side of the equation. -3.90625 + 3.90625 + t = -2.728788937 + 3.90625 Combine like terms: -3.90625 + 3.90625 = 0.00000 0.00000 + t = -2.728788937 + 3.90625 t = -2.728788937 + 3.90625 Combine like terms: -2.728788937 + 3.90625 = 1.177461063 t = 1.177461063 Simplifying t = 1.177461063

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.635038937, 1.177461063}

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