0=750-9t-16t^2

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Solution for 0=750-9t-16t^2 equation:


Simplifying
0 = 750 + -9t + -16t2

Solving
0 = 750 + -9t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -750 = -750
-750 + 9t + 16t2 = 750 + -9t + -16t2 + -750 + 9t + 16t2

Reorder the terms:
-750 + 9t + 16t2 = 750 + -750 + -9t + 9t + -16t2 + 16t2

Combine like terms: 750 + -750 = 0
-750 + 9t + 16t2 = 0 + -9t + 9t + -16t2 + 16t2
-750 + 9t + 16t2 = -9t + 9t + -16t2 + 16t2

Combine like terms: -9t + 9t = 0
-750 + 9t + 16t2 = 0 + -16t2 + 16t2
-750 + 9t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-750 + 9t + 16t2 = 0

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

Divide each side by '16'.
-46.875 + 0.5625t + t2 = 0

Move the constant term to the right:

Add '46.875' to each side of the equation.
-46.875 + 0.5625t + 46.875 + t2 = 0 + 46.875

Reorder the terms:
-46.875 + 46.875 + 0.5625t + t2 = 0 + 46.875

Combine like terms: -46.875 + 46.875 = 0.000
0.000 + 0.5625t + t2 = 0 + 46.875
0.5625t + t2 = 0 + 46.875

Combine like terms: 0 + 46.875 = 46.875
0.5625t + t2 = 46.875

The t term is 0.5625t.  Take half its coefficient (0.28125).
Square it (0.0791015625) and add it to both sides.

Add '0.0791015625' to each side of the equation.
0.5625t + 0.0791015625 + t2 = 46.875 + 0.0791015625

Reorder the terms:
0.0791015625 + 0.5625t + t2 = 46.875 + 0.0791015625

Combine like terms: 46.875 + 0.0791015625 = 46.9541015625
0.0791015625 + 0.5625t + t2 = 46.9541015625

Factor a perfect square on the left side:
(t + 0.28125)(t + 0.28125) = 46.9541015625

Calculate the square root of the right side: 6.852306295

Break this problem into two subproblems by setting 
(t + 0.28125) equal to 6.852306295 and -6.852306295.

Subproblem 1

t + 0.28125 = 6.852306295 Simplifying t + 0.28125 = 6.852306295 Reorder the terms: 0.28125 + t = 6.852306295 Solving 0.28125 + t = 6.852306295 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.28125' to each side of the equation. 0.28125 + -0.28125 + t = 6.852306295 + -0.28125 Combine like terms: 0.28125 + -0.28125 = 0.00000 0.00000 + t = 6.852306295 + -0.28125 t = 6.852306295 + -0.28125 Combine like terms: 6.852306295 + -0.28125 = 6.571056295 t = 6.571056295 Simplifying t = 6.571056295

Subproblem 2

t + 0.28125 = -6.852306295 Simplifying t + 0.28125 = -6.852306295 Reorder the terms: 0.28125 + t = -6.852306295 Solving 0.28125 + t = -6.852306295 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.28125' to each side of the equation. 0.28125 + -0.28125 + t = -6.852306295 + -0.28125 Combine like terms: 0.28125 + -0.28125 = 0.00000 0.00000 + t = -6.852306295 + -0.28125 t = -6.852306295 + -0.28125 Combine like terms: -6.852306295 + -0.28125 = -7.133556295 t = -7.133556295 Simplifying t = -7.133556295

Solution

The solution to the problem is based on the solutions from the subproblems. t = {6.571056295, -7.133556295}

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