0=-16t^2+45t+1200

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Solution for 0=-16t^2+45t+1200 equation:


Simplifying
0 = -16t2 + 45t + 1200

Reorder the terms:
0 = 1200 + 45t + -16t2

Solving
0 = 1200 + 45t + -16t2

Solving for variable 't'.

Combine like terms: 0 + -1200 = -1200
-1200 + -45t + 16t2 = 1200 + 45t + -16t2 + -1200 + -45t + 16t2

Reorder the terms:
-1200 + -45t + 16t2 = 1200 + -1200 + 45t + -45t + -16t2 + 16t2

Combine like terms: 1200 + -1200 = 0
-1200 + -45t + 16t2 = 0 + 45t + -45t + -16t2 + 16t2
-1200 + -45t + 16t2 = 45t + -45t + -16t2 + 16t2

Combine like terms: 45t + -45t = 0
-1200 + -45t + 16t2 = 0 + -16t2 + 16t2
-1200 + -45t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-1200 + -45t + 16t2 = 0

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

Divide each side by '16'.
-75 + -2.8125t + t2 = 0

Move the constant term to the right:

Add '75' to each side of the equation.
-75 + -2.8125t + 75 + t2 = 0 + 75

Reorder the terms:
-75 + 75 + -2.8125t + t2 = 0 + 75

Combine like terms: -75 + 75 = 0
0 + -2.8125t + t2 = 0 + 75
-2.8125t + t2 = 0 + 75

Combine like terms: 0 + 75 = 75
-2.8125t + t2 = 75

The t term is -2.8125t.  Take half its coefficient (-1.40625).
Square it (1.977539063) and add it to both sides.

Add '1.977539063' to each side of the equation.
-2.8125t + 1.977539063 + t2 = 75 + 1.977539063

Reorder the terms:
1.977539063 + -2.8125t + t2 = 75 + 1.977539063

Combine like terms: 75 + 1.977539063 = 76.977539063
1.977539063 + -2.8125t + t2 = 76.977539063

Factor a perfect square on the left side:
(t + -1.40625)(t + -1.40625) = 76.977539063

Calculate the square root of the right side: 8.773684463

Break this problem into two subproblems by setting 
(t + -1.40625) equal to 8.773684463 and -8.773684463.

Subproblem 1

t + -1.40625 = 8.773684463 Simplifying t + -1.40625 = 8.773684463 Reorder the terms: -1.40625 + t = 8.773684463 Solving -1.40625 + t = 8.773684463 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = 8.773684463 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = 8.773684463 + 1.40625 t = 8.773684463 + 1.40625 Combine like terms: 8.773684463 + 1.40625 = 10.179934463 t = 10.179934463 Simplifying t = 10.179934463

Subproblem 2

t + -1.40625 = -8.773684463 Simplifying t + -1.40625 = -8.773684463 Reorder the terms: -1.40625 + t = -8.773684463 Solving -1.40625 + t = -8.773684463 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.40625' to each side of the equation. -1.40625 + 1.40625 + t = -8.773684463 + 1.40625 Combine like terms: -1.40625 + 1.40625 = 0.00000 0.00000 + t = -8.773684463 + 1.40625 t = -8.773684463 + 1.40625 Combine like terms: -8.773684463 + 1.40625 = -7.367434463 t = -7.367434463 Simplifying t = -7.367434463

Solution

The solution to the problem is based on the solutions from the subproblems. t = {10.179934463, -7.367434463}

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