-16t^2+15t+68=0

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Solution for -16t^2+15t+68=0 equation:


Simplifying
-16t2 + 15t + 68 = 0

Reorder the terms:
68 + 15t + -16t2 = 0

Solving
68 + 15t + -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'.
-4.25 + -0.9375t + t2 = 0

Move the constant term to the right:

Add '4.25' to each side of the equation.
-4.25 + -0.9375t + 4.25 + t2 = 0 + 4.25

Reorder the terms:
-4.25 + 4.25 + -0.9375t + t2 = 0 + 4.25

Combine like terms: -4.25 + 4.25 = 0.00
0.00 + -0.9375t + t2 = 0 + 4.25
-0.9375t + t2 = 0 + 4.25

Combine like terms: 0 + 4.25 = 4.25
-0.9375t + t2 = 4.25

The t term is -0.9375t.  Take half its coefficient (-0.46875).
Square it (0.2197265625) and add it to both sides.

Add '0.2197265625' to each side of the equation.
-0.9375t + 0.2197265625 + t2 = 4.25 + 0.2197265625

Reorder the terms:
0.2197265625 + -0.9375t + t2 = 4.25 + 0.2197265625

Combine like terms: 4.25 + 0.2197265625 = 4.4697265625
0.2197265625 + -0.9375t + t2 = 4.4697265625

Factor a perfect square on the left side:
(t + -0.46875)(t + -0.46875) = 4.4697265625

Calculate the square root of the right side: 2.114172784

Break this problem into two subproblems by setting 
(t + -0.46875) equal to 2.114172784 and -2.114172784.

Subproblem 1

t + -0.46875 = 2.114172784 Simplifying t + -0.46875 = 2.114172784 Reorder the terms: -0.46875 + t = 2.114172784 Solving -0.46875 + t = 2.114172784 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.46875' to each side of the equation. -0.46875 + 0.46875 + t = 2.114172784 + 0.46875 Combine like terms: -0.46875 + 0.46875 = 0.00000 0.00000 + t = 2.114172784 + 0.46875 t = 2.114172784 + 0.46875 Combine like terms: 2.114172784 + 0.46875 = 2.582922784 t = 2.582922784 Simplifying t = 2.582922784

Subproblem 2

t + -0.46875 = -2.114172784 Simplifying t + -0.46875 = -2.114172784 Reorder the terms: -0.46875 + t = -2.114172784 Solving -0.46875 + t = -2.114172784 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.46875' to each side of the equation. -0.46875 + 0.46875 + t = -2.114172784 + 0.46875 Combine like terms: -0.46875 + 0.46875 = 0.00000 0.00000 + t = -2.114172784 + 0.46875 t = -2.114172784 + 0.46875 Combine like terms: -2.114172784 + 0.46875 = -1.645422784 t = -1.645422784 Simplifying t = -1.645422784

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.582922784, -1.645422784}

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