157-9t-16t^2=0

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Solution for 157-9t-16t^2=0 equation:


Simplifying
157 + -9t + -16t2 = 0

Solving
157 + -9t + -16t2 = 0

Solving for variable 't'.

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

Divide each side by '-16'.
-9.8125 + 0.5625t + t2 = 0

Move the constant term to the right:

Add '9.8125' to each side of the equation.
-9.8125 + 0.5625t + 9.8125 + t2 = 0 + 9.8125

Reorder the terms:
-9.8125 + 9.8125 + 0.5625t + t2 = 0 + 9.8125

Combine like terms: -9.8125 + 9.8125 = 0.0000
0.0000 + 0.5625t + t2 = 0 + 9.8125
0.5625t + t2 = 0 + 9.8125

Combine like terms: 0 + 9.8125 = 9.8125
0.5625t + t2 = 9.8125

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 = 9.8125 + 0.0791015625

Reorder the terms:
0.0791015625 + 0.5625t + t2 = 9.8125 + 0.0791015625

Combine like terms: 9.8125 + 0.0791015625 = 9.8916015625
0.0791015625 + 0.5625t + t2 = 9.8916015625

Factor a perfect square on the left side:
(t + 0.28125)(t + 0.28125) = 9.8916015625

Calculate the square root of the right side: 3.145091662

Break this problem into two subproblems by setting 
(t + 0.28125) equal to 3.145091662 and -3.145091662.

Subproblem 1

t + 0.28125 = 3.145091662 Simplifying t + 0.28125 = 3.145091662 Reorder the terms: 0.28125 + t = 3.145091662 Solving 0.28125 + t = 3.145091662 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 = 3.145091662 + -0.28125 Combine like terms: 0.28125 + -0.28125 = 0.00000 0.00000 + t = 3.145091662 + -0.28125 t = 3.145091662 + -0.28125 Combine like terms: 3.145091662 + -0.28125 = 2.863841662 t = 2.863841662 Simplifying t = 2.863841662

Subproblem 2

t + 0.28125 = -3.145091662 Simplifying t + 0.28125 = -3.145091662 Reorder the terms: 0.28125 + t = -3.145091662 Solving 0.28125 + t = -3.145091662 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 = -3.145091662 + -0.28125 Combine like terms: 0.28125 + -0.28125 = 0.00000 0.00000 + t = -3.145091662 + -0.28125 t = -3.145091662 + -0.28125 Combine like terms: -3.145091662 + -0.28125 = -3.426341662 t = -3.426341662 Simplifying t = -3.426341662

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.863841662, -3.426341662}

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