127=-16t^2+127t

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Solution for 127=-16t^2+127t equation:


Simplifying
127 = -16t2 + 127t

Reorder the terms:
127 = 127t + -16t2

Solving
127 = 127t + -16t2

Solving for variable 't'.

Reorder the terms:
127 + -127t + 16t2 = 127t + -127t + -16t2 + 16t2

Combine like terms: 127t + -127t = 0
127 + -127t + 16t2 = 0 + -16t2 + 16t2
127 + -127t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
127 + -127t + 16t2 = 0

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

Divide each side by '16'.
7.9375 + -7.9375t + t2 = 0

Move the constant term to the right:

Add '-7.9375' to each side of the equation.
7.9375 + -7.9375t + -7.9375 + t2 = 0 + -7.9375

Reorder the terms:
7.9375 + -7.9375 + -7.9375t + t2 = 0 + -7.9375

Combine like terms: 7.9375 + -7.9375 = 0.0000
0.0000 + -7.9375t + t2 = 0 + -7.9375
-7.9375t + t2 = 0 + -7.9375

Combine like terms: 0 + -7.9375 = -7.9375
-7.9375t + t2 = -7.9375

The t term is -7.9375t.  Take half its coefficient (-3.96875).
Square it (15.75097656) and add it to both sides.

Add '15.75097656' to each side of the equation.
-7.9375t + 15.75097656 + t2 = -7.9375 + 15.75097656

Reorder the terms:
15.75097656 + -7.9375t + t2 = -7.9375 + 15.75097656

Combine like terms: -7.9375 + 15.75097656 = 7.81347656
15.75097656 + -7.9375t + t2 = 7.81347656

Factor a perfect square on the left side:
(t + -3.96875)(t + -3.96875) = 7.81347656

Calculate the square root of the right side: 2.795259659

Break this problem into two subproblems by setting 
(t + -3.96875) equal to 2.795259659 and -2.795259659.

Subproblem 1

t + -3.96875 = 2.795259659 Simplifying t + -3.96875 = 2.795259659 Reorder the terms: -3.96875 + t = 2.795259659 Solving -3.96875 + t = 2.795259659 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.96875' to each side of the equation. -3.96875 + 3.96875 + t = 2.795259659 + 3.96875 Combine like terms: -3.96875 + 3.96875 = 0.00000 0.00000 + t = 2.795259659 + 3.96875 t = 2.795259659 + 3.96875 Combine like terms: 2.795259659 + 3.96875 = 6.764009659 t = 6.764009659 Simplifying t = 6.764009659

Subproblem 2

t + -3.96875 = -2.795259659 Simplifying t + -3.96875 = -2.795259659 Reorder the terms: -3.96875 + t = -2.795259659 Solving -3.96875 + t = -2.795259659 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.96875' to each side of the equation. -3.96875 + 3.96875 + t = -2.795259659 + 3.96875 Combine like terms: -3.96875 + 3.96875 = 0.00000 0.00000 + t = -2.795259659 + 3.96875 t = -2.795259659 + 3.96875 Combine like terms: -2.795259659 + 3.96875 = 1.173490341 t = 1.173490341 Simplifying t = 1.173490341

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.764009659, 1.173490341}

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