0=-16t^2+90t+3

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Solution for 0=-16t^2+90t+3 equation:


Simplifying
0 = -16t2 + 90t + 3

Reorder the terms:
0 = 3 + 90t + -16t2

Solving
0 = 3 + 90t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -3 = -3
-3 + -90t + 16t2 = 3 + 90t + -16t2 + -3 + -90t + 16t2

Reorder the terms:
-3 + -90t + 16t2 = 3 + -3 + 90t + -90t + -16t2 + 16t2

Combine like terms: 3 + -3 = 0
-3 + -90t + 16t2 = 0 + 90t + -90t + -16t2 + 16t2
-3 + -90t + 16t2 = 90t + -90t + -16t2 + 16t2

Combine like terms: 90t + -90t = 0
-3 + -90t + 16t2 = 0 + -16t2 + 16t2
-3 + -90t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-3 + -90t + 16t2 = 0

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

Divide each side by '16'.
-0.1875 + -5.625t + t2 = 0

Move the constant term to the right:

Add '0.1875' to each side of the equation.
-0.1875 + -5.625t + 0.1875 + t2 = 0 + 0.1875

Reorder the terms:
-0.1875 + 0.1875 + -5.625t + t2 = 0 + 0.1875

Combine like terms: -0.1875 + 0.1875 = 0.0000
0.0000 + -5.625t + t2 = 0 + 0.1875
-5.625t + t2 = 0 + 0.1875

Combine like terms: 0 + 0.1875 = 0.1875
-5.625t + t2 = 0.1875

The t term is -5.625t.  Take half its coefficient (-2.8125).
Square it (7.91015625) and add it to both sides.

Add '7.91015625' to each side of the equation.
-5.625t + 7.91015625 + t2 = 0.1875 + 7.91015625

Reorder the terms:
7.91015625 + -5.625t + t2 = 0.1875 + 7.91015625

Combine like terms: 0.1875 + 7.91015625 = 8.09765625
7.91015625 + -5.625t + t2 = 8.09765625

Factor a perfect square on the left side:
(t + -2.8125)(t + -2.8125) = 8.09765625

Calculate the square root of the right side: 2.845638109

Break this problem into two subproblems by setting 
(t + -2.8125) equal to 2.845638109 and -2.845638109.

Subproblem 1

t + -2.8125 = 2.845638109 Simplifying t + -2.8125 = 2.845638109 Reorder the terms: -2.8125 + t = 2.845638109 Solving -2.8125 + t = 2.845638109 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.8125' to each side of the equation. -2.8125 + 2.8125 + t = 2.845638109 + 2.8125 Combine like terms: -2.8125 + 2.8125 = 0.0000 0.0000 + t = 2.845638109 + 2.8125 t = 2.845638109 + 2.8125 Combine like terms: 2.845638109 + 2.8125 = 5.658138109 t = 5.658138109 Simplifying t = 5.658138109

Subproblem 2

t + -2.8125 = -2.845638109 Simplifying t + -2.8125 = -2.845638109 Reorder the terms: -2.8125 + t = -2.845638109 Solving -2.8125 + t = -2.845638109 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.8125' to each side of the equation. -2.8125 + 2.8125 + t = -2.845638109 + 2.8125 Combine like terms: -2.8125 + 2.8125 = 0.0000 0.0000 + t = -2.845638109 + 2.8125 t = -2.845638109 + 2.8125 Combine like terms: -2.845638109 + 2.8125 = -0.033138109 t = -0.033138109 Simplifying t = -0.033138109

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.658138109, -0.033138109}

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