-8t^2+63t+2=0

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Solution for -8t^2+63t+2=0 equation:


Simplifying
-8t2 + 63t + 2 = 0

Reorder the terms:
2 + 63t + -8t2 = 0

Solving
2 + 63t + -8t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-0.25 + -7.875t + t2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + -7.875t + 0.25 + t2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + -7.875t + t2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + -7.875t + t2 = 0 + 0.25
-7.875t + t2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
-7.875t + t2 = 0.25

The t term is -7.875t.  Take half its coefficient (-3.9375).
Square it (15.50390625) and add it to both sides.

Add '15.50390625' to each side of the equation.
-7.875t + 15.50390625 + t2 = 0.25 + 15.50390625

Reorder the terms:
15.50390625 + -7.875t + t2 = 0.25 + 15.50390625

Combine like terms: 0.25 + 15.50390625 = 15.75390625
15.50390625 + -7.875t + t2 = 15.75390625

Factor a perfect square on the left side:
(t + -3.9375)(t + -3.9375) = 15.75390625

Calculate the square root of the right side: 3.969119077

Break this problem into two subproblems by setting 
(t + -3.9375) equal to 3.969119077 and -3.969119077.

Subproblem 1

t + -3.9375 = 3.969119077 Simplifying t + -3.9375 = 3.969119077 Reorder the terms: -3.9375 + t = 3.969119077 Solving -3.9375 + t = 3.969119077 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.9375' to each side of the equation. -3.9375 + 3.9375 + t = 3.969119077 + 3.9375 Combine like terms: -3.9375 + 3.9375 = 0.0000 0.0000 + t = 3.969119077 + 3.9375 t = 3.969119077 + 3.9375 Combine like terms: 3.969119077 + 3.9375 = 7.906619077 t = 7.906619077 Simplifying t = 7.906619077

Subproblem 2

t + -3.9375 = -3.969119077 Simplifying t + -3.9375 = -3.969119077 Reorder the terms: -3.9375 + t = -3.969119077 Solving -3.9375 + t = -3.969119077 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.9375' to each side of the equation. -3.9375 + 3.9375 + t = -3.969119077 + 3.9375 Combine like terms: -3.9375 + 3.9375 = 0.0000 0.0000 + t = -3.969119077 + 3.9375 t = -3.969119077 + 3.9375 Combine like terms: -3.969119077 + 3.9375 = -0.031619077 t = -0.031619077 Simplifying t = -0.031619077

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.906619077, -0.031619077}

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