8t^2+11t-150=0

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Solution for 8t^2+11t-150=0 equation:


Simplifying
8t2 + 11t + -150 = 0

Reorder the terms:
-150 + 11t + 8t2 = 0

Solving
-150 + 11t + 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'.
-18.75 + 1.375t + t2 = 0

Move the constant term to the right:

Add '18.75' to each side of the equation.
-18.75 + 1.375t + 18.75 + t2 = 0 + 18.75

Reorder the terms:
-18.75 + 18.75 + 1.375t + t2 = 0 + 18.75

Combine like terms: -18.75 + 18.75 = 0.00
0.00 + 1.375t + t2 = 0 + 18.75
1.375t + t2 = 0 + 18.75

Combine like terms: 0 + 18.75 = 18.75
1.375t + t2 = 18.75

The t term is 1.375t.  Take half its coefficient (0.6875).
Square it (0.47265625) and add it to both sides.

Add '0.47265625' to each side of the equation.
1.375t + 0.47265625 + t2 = 18.75 + 0.47265625

Reorder the terms:
0.47265625 + 1.375t + t2 = 18.75 + 0.47265625

Combine like terms: 18.75 + 0.47265625 = 19.22265625
0.47265625 + 1.375t + t2 = 19.22265625

Factor a perfect square on the left side:
(t + 0.6875)(t + 0.6875) = 19.22265625

Calculate the square root of the right side: 4.384364977

Break this problem into two subproblems by setting 
(t + 0.6875) equal to 4.384364977 and -4.384364977.

Subproblem 1

t + 0.6875 = 4.384364977 Simplifying t + 0.6875 = 4.384364977 Reorder the terms: 0.6875 + t = 4.384364977 Solving 0.6875 + t = 4.384364977 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.6875' to each side of the equation. 0.6875 + -0.6875 + t = 4.384364977 + -0.6875 Combine like terms: 0.6875 + -0.6875 = 0.0000 0.0000 + t = 4.384364977 + -0.6875 t = 4.384364977 + -0.6875 Combine like terms: 4.384364977 + -0.6875 = 3.696864977 t = 3.696864977 Simplifying t = 3.696864977

Subproblem 2

t + 0.6875 = -4.384364977 Simplifying t + 0.6875 = -4.384364977 Reorder the terms: 0.6875 + t = -4.384364977 Solving 0.6875 + t = -4.384364977 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.6875' to each side of the equation. 0.6875 + -0.6875 + t = -4.384364977 + -0.6875 Combine like terms: 0.6875 + -0.6875 = 0.0000 0.0000 + t = -4.384364977 + -0.6875 t = -4.384364977 + -0.6875 Combine like terms: -4.384364977 + -0.6875 = -5.071864977 t = -5.071864977 Simplifying t = -5.071864977

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.696864977, -5.071864977}

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