4t^2-45t-99=0

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Solution for 4t^2-45t-99=0 equation:


Simplifying
4t2 + -45t + -99 = 0

Reorder the terms:
-99 + -45t + 4t2 = 0

Solving
-99 + -45t + 4t2 = 0

Solving for variable 't'.

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

Divide each side by '4'.
-24.75 + -11.25t + t2 = 0

Move the constant term to the right:

Add '24.75' to each side of the equation.
-24.75 + -11.25t + 24.75 + t2 = 0 + 24.75

Reorder the terms:
-24.75 + 24.75 + -11.25t + t2 = 0 + 24.75

Combine like terms: -24.75 + 24.75 = 0.00
0.00 + -11.25t + t2 = 0 + 24.75
-11.25t + t2 = 0 + 24.75

Combine like terms: 0 + 24.75 = 24.75
-11.25t + t2 = 24.75

The t term is -11.25t.  Take half its coefficient (-5.625).
Square it (31.640625) and add it to both sides.

Add '31.640625' to each side of the equation.
-11.25t + 31.640625 + t2 = 24.75 + 31.640625

Reorder the terms:
31.640625 + -11.25t + t2 = 24.75 + 31.640625

Combine like terms: 24.75 + 31.640625 = 56.390625
31.640625 + -11.25t + t2 = 56.390625

Factor a perfect square on the left side:
(t + -5.625)(t + -5.625) = 56.390625

Calculate the square root of the right side: 7.509369148

Break this problem into two subproblems by setting 
(t + -5.625) equal to 7.509369148 and -7.509369148.

Subproblem 1

t + -5.625 = 7.509369148 Simplifying t + -5.625 = 7.509369148 Reorder the terms: -5.625 + t = 7.509369148 Solving -5.625 + t = 7.509369148 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.625' to each side of the equation. -5.625 + 5.625 + t = 7.509369148 + 5.625 Combine like terms: -5.625 + 5.625 = 0.000 0.000 + t = 7.509369148 + 5.625 t = 7.509369148 + 5.625 Combine like terms: 7.509369148 + 5.625 = 13.134369148 t = 13.134369148 Simplifying t = 13.134369148

Subproblem 2

t + -5.625 = -7.509369148 Simplifying t + -5.625 = -7.509369148 Reorder the terms: -5.625 + t = -7.509369148 Solving -5.625 + t = -7.509369148 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.625' to each side of the equation. -5.625 + 5.625 + t = -7.509369148 + 5.625 Combine like terms: -5.625 + 5.625 = 0.000 0.000 + t = -7.509369148 + 5.625 t = -7.509369148 + 5.625 Combine like terms: -7.509369148 + 5.625 = -1.884369148 t = -1.884369148 Simplifying t = -1.884369148

Solution

The solution to the problem is based on the solutions from the subproblems. t = {13.134369148, -1.884369148}

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