19.6728t^2-156.792t+126.02=0

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Solution for 19.6728t^2-156.792t+126.02=0 equation:


Simplifying
19.6728t2 + -156.792t + 126.02 = 0

Reorder the terms:
126.02 + -156.792t + 19.6728t2 = 0

Solving
126.02 + -156.792t + 19.6728t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
19.6728 the coefficient of the squared term: 

Divide each side by '19.6728'.
6.40579887 + -7.96998902t + t2 = 0

Move the constant term to the right:

Add '-6.40579887' to each side of the equation.
6.40579887 + -7.96998902t + -6.40579887 + t2 = 0 + -6.40579887

Reorder the terms:
6.40579887 + -6.40579887 + -7.96998902t + t2 = 0 + -6.40579887

Combine like terms: 6.40579887 + -6.40579887 = 0.00000000
0.00000000 + -7.96998902t + t2 = 0 + -6.40579887
-7.96998902t + t2 = 0 + -6.40579887

Combine like terms: 0 + -6.40579887 = -6.40579887
-7.96998902t + t2 = -6.40579887

The t term is -7.96998902t.  Take half its coefficient (-3.98499451).
Square it (15.88018124) and add it to both sides.

Add '15.88018124' to each side of the equation.
-7.96998902t + 15.88018124 + t2 = -6.40579887 + 15.88018124

Reorder the terms:
15.88018124 + -7.96998902t + t2 = -6.40579887 + 15.88018124

Combine like terms: -6.40579887 + 15.88018124 = 9.47438237
15.88018124 + -7.96998902t + t2 = 9.47438237

Factor a perfect square on the left side:
(t + -3.98499451)(t + -3.98499451) = 9.47438237

Calculate the square root of the right side: 3.078048468

Break this problem into two subproblems by setting 
(t + -3.98499451) equal to 3.078048468 and -3.078048468.

Subproblem 1

t + -3.98499451 = 3.078048468 Simplifying t + -3.98499451 = 3.078048468 Reorder the terms: -3.98499451 + t = 3.078048468 Solving -3.98499451 + t = 3.078048468 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.98499451' to each side of the equation. -3.98499451 + 3.98499451 + t = 3.078048468 + 3.98499451 Combine like terms: -3.98499451 + 3.98499451 = 0.00000000 0.00000000 + t = 3.078048468 + 3.98499451 t = 3.078048468 + 3.98499451 Combine like terms: 3.078048468 + 3.98499451 = 7.063042978 t = 7.063042978 Simplifying t = 7.063042978

Subproblem 2

t + -3.98499451 = -3.078048468 Simplifying t + -3.98499451 = -3.078048468 Reorder the terms: -3.98499451 + t = -3.078048468 Solving -3.98499451 + t = -3.078048468 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.98499451' to each side of the equation. -3.98499451 + 3.98499451 + t = -3.078048468 + 3.98499451 Combine like terms: -3.98499451 + 3.98499451 = 0.00000000 0.00000000 + t = -3.078048468 + 3.98499451 t = -3.078048468 + 3.98499451 Combine like terms: -3.078048468 + 3.98499451 = 0.906946042 t = 0.906946042 Simplifying t = 0.906946042

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.063042978, 0.906946042}

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