16t^2-31t+7=0

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Solution for 16t^2-31t+7=0 equation:


Simplifying
16t2 + -31t + 7 = 0

Reorder the terms:
7 + -31t + 16t2 = 0

Solving
7 + -31t + 16t2 = 0

Solving for variable 't'.

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

Divide each side by '16'.
0.4375 + -1.9375t + t2 = 0

Move the constant term to the right:

Add '-0.4375' to each side of the equation.
0.4375 + -1.9375t + -0.4375 + t2 = 0 + -0.4375

Reorder the terms:
0.4375 + -0.4375 + -1.9375t + t2 = 0 + -0.4375

Combine like terms: 0.4375 + -0.4375 = 0.0000
0.0000 + -1.9375t + t2 = 0 + -0.4375
-1.9375t + t2 = 0 + -0.4375

Combine like terms: 0 + -0.4375 = -0.4375
-1.9375t + t2 = -0.4375

The t term is -1.9375t.  Take half its coefficient (-0.96875).
Square it (0.9384765625) and add it to both sides.

Add '0.9384765625' to each side of the equation.
-1.9375t + 0.9384765625 + t2 = -0.4375 + 0.9384765625

Reorder the terms:
0.9384765625 + -1.9375t + t2 = -0.4375 + 0.9384765625

Combine like terms: -0.4375 + 0.9384765625 = 0.5009765625
0.9384765625 + -1.9375t + t2 = 0.5009765625

Factor a perfect square on the left side:
(t + -0.96875)(t + -0.96875) = 0.5009765625

Calculate the square root of the right side: 0.707796978

Break this problem into two subproblems by setting 
(t + -0.96875) equal to 0.707796978 and -0.707796978.

Subproblem 1

t + -0.96875 = 0.707796978 Simplifying t + -0.96875 = 0.707796978 Reorder the terms: -0.96875 + t = 0.707796978 Solving -0.96875 + t = 0.707796978 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.96875' to each side of the equation. -0.96875 + 0.96875 + t = 0.707796978 + 0.96875 Combine like terms: -0.96875 + 0.96875 = 0.00000 0.00000 + t = 0.707796978 + 0.96875 t = 0.707796978 + 0.96875 Combine like terms: 0.707796978 + 0.96875 = 1.676546978 t = 1.676546978 Simplifying t = 1.676546978

Subproblem 2

t + -0.96875 = -0.707796978 Simplifying t + -0.96875 = -0.707796978 Reorder the terms: -0.96875 + t = -0.707796978 Solving -0.96875 + t = -0.707796978 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.96875' to each side of the equation. -0.96875 + 0.96875 + t = -0.707796978 + 0.96875 Combine like terms: -0.96875 + 0.96875 = 0.00000 0.00000 + t = -0.707796978 + 0.96875 t = -0.707796978 + 0.96875 Combine like terms: -0.707796978 + 0.96875 = 0.260953022 t = 0.260953022 Simplifying t = 0.260953022

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.676546978, 0.260953022}

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