7=-16t^2+10t+8

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Solution for 7=-16t^2+10t+8 equation:


Simplifying
7 = -16t2 + 10t + 8

Reorder the terms:
7 = 8 + 10t + -16t2

Solving
7 = 8 + 10t + -16t2

Solving for variable 't'.

Combine like terms: 7 + -8 = -1
-1 + -10t + 16t2 = 8 + 10t + -16t2 + -8 + -10t + 16t2

Reorder the terms:
-1 + -10t + 16t2 = 8 + -8 + 10t + -10t + -16t2 + 16t2

Combine like terms: 8 + -8 = 0
-1 + -10t + 16t2 = 0 + 10t + -10t + -16t2 + 16t2
-1 + -10t + 16t2 = 10t + -10t + -16t2 + 16t2

Combine like terms: 10t + -10t = 0
-1 + -10t + 16t2 = 0 + -16t2 + 16t2
-1 + -10t + 16t2 = -16t2 + 16t2

Combine like terms: -16t2 + 16t2 = 0
-1 + -10t + 16t2 = 0

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

Divide each side by '16'.
-0.0625 + -0.625t + t2 = 0

Move the constant term to the right:

Add '0.0625' to each side of the equation.
-0.0625 + -0.625t + 0.0625 + t2 = 0 + 0.0625

Reorder the terms:
-0.0625 + 0.0625 + -0.625t + t2 = 0 + 0.0625

Combine like terms: -0.0625 + 0.0625 = 0.0000
0.0000 + -0.625t + t2 = 0 + 0.0625
-0.625t + t2 = 0 + 0.0625

Combine like terms: 0 + 0.0625 = 0.0625
-0.625t + t2 = 0.0625

The t term is -0.625t.  Take half its coefficient (-0.3125).
Square it (0.09765625) and add it to both sides.

Add '0.09765625' to each side of the equation.
-0.625t + 0.09765625 + t2 = 0.0625 + 0.09765625

Reorder the terms:
0.09765625 + -0.625t + t2 = 0.0625 + 0.09765625

Combine like terms: 0.0625 + 0.09765625 = 0.16015625
0.09765625 + -0.625t + t2 = 0.16015625

Factor a perfect square on the left side:
(t + -0.3125)(t + -0.3125) = 0.16015625

Calculate the square root of the right side: 0.400195265

Break this problem into two subproblems by setting 
(t + -0.3125) equal to 0.400195265 and -0.400195265.

Subproblem 1

t + -0.3125 = 0.400195265 Simplifying t + -0.3125 = 0.400195265 Reorder the terms: -0.3125 + t = 0.400195265 Solving -0.3125 + t = 0.400195265 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.3125' to each side of the equation. -0.3125 + 0.3125 + t = 0.400195265 + 0.3125 Combine like terms: -0.3125 + 0.3125 = 0.0000 0.0000 + t = 0.400195265 + 0.3125 t = 0.400195265 + 0.3125 Combine like terms: 0.400195265 + 0.3125 = 0.712695265 t = 0.712695265 Simplifying t = 0.712695265

Subproblem 2

t + -0.3125 = -0.400195265 Simplifying t + -0.3125 = -0.400195265 Reorder the terms: -0.3125 + t = -0.400195265 Solving -0.3125 + t = -0.400195265 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.3125' to each side of the equation. -0.3125 + 0.3125 + t = -0.400195265 + 0.3125 Combine like terms: -0.3125 + 0.3125 = 0.0000 0.0000 + t = -0.400195265 + 0.3125 t = -0.400195265 + 0.3125 Combine like terms: -0.400195265 + 0.3125 = -0.087695265 t = -0.087695265 Simplifying t = -0.087695265

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.712695265, -0.087695265}

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