1.257=1.20t+8t^2

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Solution for 1.257=1.20t+8t^2 equation:


Simplifying
1.257 = 1.20t + 8t2

Solving
1.257 = 1.20t + 8t2

Solving for variable 't'.

Reorder the terms:
1.257 + -1.20t + -8t2 = 1.20t + -1.20t + 8t2 + -8t2

Combine like terms: 1.20t + -1.20t = 0.00
1.257 + -1.20t + -8t2 = 0.00 + 8t2 + -8t2
1.257 + -1.20t + -8t2 = 8t2 + -8t2

Combine like terms: 8t2 + -8t2 = 0
1.257 + -1.20t + -8t2 = 0

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-0.157125 + 0.15t + t2 = 0

Move the constant term to the right:

Add '0.157125' to each side of the equation.
-0.157125 + 0.15t + 0.157125 + t2 = 0 + 0.157125

Reorder the terms:
-0.157125 + 0.157125 + 0.15t + t2 = 0 + 0.157125

Combine like terms: -0.157125 + 0.157125 = 0.000000
0.000000 + 0.15t + t2 = 0 + 0.157125
0.15t + t2 = 0 + 0.157125

Combine like terms: 0 + 0.157125 = 0.157125
0.15t + t2 = 0.157125

The t term is 0.15t.  Take half its coefficient (0.075).
Square it (0.005625) and add it to both sides.

Add '0.005625' to each side of the equation.
0.15t + 0.005625 + t2 = 0.157125 + 0.005625

Reorder the terms:
0.005625 + 0.15t + t2 = 0.157125 + 0.005625

Combine like terms: 0.157125 + 0.005625 = 0.16275
0.005625 + 0.15t + t2 = 0.16275

Factor a perfect square on the left side:
(t + 0.075)(t + 0.075) = 0.16275

Calculate the square root of the right side: 0.403422855

Break this problem into two subproblems by setting 
(t + 0.075) equal to 0.403422855 and -0.403422855.

Subproblem 1

t + 0.075 = 0.403422855 Simplifying t + 0.075 = 0.403422855 Reorder the terms: 0.075 + t = 0.403422855 Solving 0.075 + t = 0.403422855 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.075' to each side of the equation. 0.075 + -0.075 + t = 0.403422855 + -0.075 Combine like terms: 0.075 + -0.075 = 0.000 0.000 + t = 0.403422855 + -0.075 t = 0.403422855 + -0.075 Combine like terms: 0.403422855 + -0.075 = 0.328422855 t = 0.328422855 Simplifying t = 0.328422855

Subproblem 2

t + 0.075 = -0.403422855 Simplifying t + 0.075 = -0.403422855 Reorder the terms: 0.075 + t = -0.403422855 Solving 0.075 + t = -0.403422855 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.075' to each side of the equation. 0.075 + -0.075 + t = -0.403422855 + -0.075 Combine like terms: 0.075 + -0.075 = 0.000 0.000 + t = -0.403422855 + -0.075 t = -0.403422855 + -0.075 Combine like terms: -0.403422855 + -0.075 = -0.478422855 t = -0.478422855 Simplifying t = -0.478422855

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.328422855, -0.478422855}

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