45(t)=-16t^2+25t+45

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Solution for 45(t)=-16t^2+25t+45 equation:


Simplifying
45(t) = -16t2 + 25t + 45

Reorder the terms:
45t = 45 + 25t + -16t2

Solving
45t = 45 + 25t + -16t2

Solving for variable 't'.

Reorder the terms:
-45 + 45t + -25t + 16t2 = 45 + 25t + -16t2 + -45 + -25t + 16t2

Combine like terms: 45t + -25t = 20t
-45 + 20t + 16t2 = 45 + 25t + -16t2 + -45 + -25t + 16t2

Reorder the terms:
-45 + 20t + 16t2 = 45 + -45 + 25t + -25t + -16t2 + 16t2

Combine like terms: 45 + -45 = 0
-45 + 20t + 16t2 = 0 + 25t + -25t + -16t2 + 16t2
-45 + 20t + 16t2 = 25t + -25t + -16t2 + 16t2

Combine like terms: 25t + -25t = 0
-45 + 20t + 16t2 = 0 + -16t2 + 16t2
-45 + 20t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-45 + 20t + 16t2 = 0

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

Divide each side by '16'.
-2.8125 + 1.25t + t2 = 0

Move the constant term to the right:

Add '2.8125' to each side of the equation.
-2.8125 + 1.25t + 2.8125 + t2 = 0 + 2.8125

Reorder the terms:
-2.8125 + 2.8125 + 1.25t + t2 = 0 + 2.8125

Combine like terms: -2.8125 + 2.8125 = 0.0000
0.0000 + 1.25t + t2 = 0 + 2.8125
1.25t + t2 = 0 + 2.8125

Combine like terms: 0 + 2.8125 = 2.8125
1.25t + t2 = 2.8125

The t term is 1.25t.  Take half its coefficient (0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
1.25t + 0.390625 + t2 = 2.8125 + 0.390625

Reorder the terms:
0.390625 + 1.25t + t2 = 2.8125 + 0.390625

Combine like terms: 2.8125 + 0.390625 = 3.203125
0.390625 + 1.25t + t2 = 3.203125

Factor a perfect square on the left side:
(t + 0.625)(t + 0.625) = 3.203125

Calculate the square root of the right side: 1.789727633

Break this problem into two subproblems by setting 
(t + 0.625) equal to 1.789727633 and -1.789727633.

Subproblem 1

t + 0.625 = 1.789727633 Simplifying t + 0.625 = 1.789727633 Reorder the terms: 0.625 + t = 1.789727633 Solving 0.625 + t = 1.789727633 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + t = 1.789727633 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + t = 1.789727633 + -0.625 t = 1.789727633 + -0.625 Combine like terms: 1.789727633 + -0.625 = 1.164727633 t = 1.164727633 Simplifying t = 1.164727633

Subproblem 2

t + 0.625 = -1.789727633 Simplifying t + 0.625 = -1.789727633 Reorder the terms: 0.625 + t = -1.789727633 Solving 0.625 + t = -1.789727633 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + t = -1.789727633 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + t = -1.789727633 + -0.625 t = -1.789727633 + -0.625 Combine like terms: -1.789727633 + -0.625 = -2.414727633 t = -2.414727633 Simplifying t = -2.414727633

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.164727633, -2.414727633}

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