3=-16t^2+30t+12

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Solution for 3=-16t^2+30t+12 equation:


Simplifying
3 = -16t2 + 30t + 12

Reorder the terms:
3 = 12 + 30t + -16t2

Solving
3 = 12 + 30t + -16t2

Solving for variable 't'.

Combine like terms: 3 + -12 = -9
-9 + -30t + 16t2 = 12 + 30t + -16t2 + -12 + -30t + 16t2

Reorder the terms:
-9 + -30t + 16t2 = 12 + -12 + 30t + -30t + -16t2 + 16t2

Combine like terms: 12 + -12 = 0
-9 + -30t + 16t2 = 0 + 30t + -30t + -16t2 + 16t2
-9 + -30t + 16t2 = 30t + -30t + -16t2 + 16t2

Combine like terms: 30t + -30t = 0
-9 + -30t + 16t2 = 0 + -16t2 + 16t2
-9 + -30t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-9 + -30t + 16t2 = 0

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

Divide each side by '16'.
-0.5625 + -1.875t + t2 = 0

Move the constant term to the right:

Add '0.5625' to each side of the equation.
-0.5625 + -1.875t + 0.5625 + t2 = 0 + 0.5625

Reorder the terms:
-0.5625 + 0.5625 + -1.875t + t2 = 0 + 0.5625

Combine like terms: -0.5625 + 0.5625 = 0.0000
0.0000 + -1.875t + t2 = 0 + 0.5625
-1.875t + t2 = 0 + 0.5625

Combine like terms: 0 + 0.5625 = 0.5625
-1.875t + t2 = 0.5625

The t term is -1.875t.  Take half its coefficient (-0.9375).
Square it (0.87890625) and add it to both sides.

Add '0.87890625' to each side of the equation.
-1.875t + 0.87890625 + t2 = 0.5625 + 0.87890625

Reorder the terms:
0.87890625 + -1.875t + t2 = 0.5625 + 0.87890625

Combine like terms: 0.5625 + 0.87890625 = 1.44140625
0.87890625 + -1.875t + t2 = 1.44140625

Factor a perfect square on the left side:
(t + -0.9375)(t + -0.9375) = 1.44140625

Calculate the square root of the right side: 1.200585795

Break this problem into two subproblems by setting 
(t + -0.9375) equal to 1.200585795 and -1.200585795.

Subproblem 1

t + -0.9375 = 1.200585795 Simplifying t + -0.9375 = 1.200585795 Reorder the terms: -0.9375 + t = 1.200585795 Solving -0.9375 + t = 1.200585795 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.9375' to each side of the equation. -0.9375 + 0.9375 + t = 1.200585795 + 0.9375 Combine like terms: -0.9375 + 0.9375 = 0.0000 0.0000 + t = 1.200585795 + 0.9375 t = 1.200585795 + 0.9375 Combine like terms: 1.200585795 + 0.9375 = 2.138085795 t = 2.138085795 Simplifying t = 2.138085795

Subproblem 2

t + -0.9375 = -1.200585795 Simplifying t + -0.9375 = -1.200585795 Reorder the terms: -0.9375 + t = -1.200585795 Solving -0.9375 + t = -1.200585795 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.9375' to each side of the equation. -0.9375 + 0.9375 + t = -1.200585795 + 0.9375 Combine like terms: -0.9375 + 0.9375 = 0.0000 0.0000 + t = -1.200585795 + 0.9375 t = -1.200585795 + 0.9375 Combine like terms: -1.200585795 + 0.9375 = -0.263085795 t = -0.263085795 Simplifying t = -0.263085795

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.138085795, -0.263085795}

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