8=-0.0417t^2-.08333t+10

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Solution for 8=-0.0417t^2-.08333t+10 equation:


Simplifying
8 = -0.0417t2 + -0.08333t + 10

Reorder the terms:
8 = 10 + -0.08333t + -0.0417t2

Solving
8 = 10 + -0.08333t + -0.0417t2

Solving for variable 't'.

Combine like terms: 8 + -10 = -2
-2 + 0.08333t + 0.0417t2 = 10 + -0.08333t + -0.0417t2 + -10 + 0.08333t + 0.0417t2

Reorder the terms:
-2 + 0.08333t + 0.0417t2 = 10 + -10 + -0.08333t + 0.08333t + -0.0417t2 + 0.0417t2

Combine like terms: 10 + -10 = 0
-2 + 0.08333t + 0.0417t2 = 0 + -0.08333t + 0.08333t + -0.0417t2 + 0.0417t2
-2 + 0.08333t + 0.0417t2 = -0.08333t + 0.08333t + -0.0417t2 + 0.0417t2

Combine like terms: -0.08333t + 0.08333t = 0.00000
-2 + 0.08333t + 0.0417t2 = 0.00000 + -0.0417t2 + 0.0417t2
-2 + 0.08333t + 0.0417t2 = -0.0417t2 + 0.0417t2

Combine like terms: -0.0417t2 + 0.0417t2 = 0.0000
-2 + 0.08333t + 0.0417t2 = 0.0000

Begin completing the square.  Divide all terms by
0.0417 the coefficient of the squared term: 

Divide each side by '0.0417'.
-47.9616307 + 1.998321343t + t2 = 0

Move the constant term to the right:

Add '47.9616307' to each side of the equation.
-47.9616307 + 1.998321343t + 47.9616307 + t2 = 0 + 47.9616307

Reorder the terms:
-47.9616307 + 47.9616307 + 1.998321343t + t2 = 0 + 47.9616307

Combine like terms: -47.9616307 + 47.9616307 = 0.0000000
0.0000000 + 1.998321343t + t2 = 0 + 47.9616307
1.998321343t + t2 = 0 + 47.9616307

Combine like terms: 0 + 47.9616307 = 47.9616307
1.998321343t + t2 = 47.9616307

The t term is 1.998321343t.  Take half its coefficient (0.9991606715).
Square it (0.9983220475) and add it to both sides.

Add '0.9983220475' to each side of the equation.
1.998321343t + 0.9983220475 + t2 = 47.9616307 + 0.9983220475

Reorder the terms:
0.9983220475 + 1.998321343t + t2 = 47.9616307 + 0.9983220475

Combine like terms: 47.9616307 + 0.9983220475 = 48.9599527475
0.9983220475 + 1.998321343t + t2 = 48.9599527475

Factor a perfect square on the left side:
(t + 0.9991606715)(t + 0.9991606715) = 48.9599527475

Calculate the square root of the right side: 6.997138897

Break this problem into two subproblems by setting 
(t + 0.9991606715) equal to 6.997138897 and -6.997138897.

Subproblem 1

t + 0.9991606715 = 6.997138897 Simplifying t + 0.9991606715 = 6.997138897 Reorder the terms: 0.9991606715 + t = 6.997138897 Solving 0.9991606715 + t = 6.997138897 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.9991606715' to each side of the equation. 0.9991606715 + -0.9991606715 + t = 6.997138897 + -0.9991606715 Combine like terms: 0.9991606715 + -0.9991606715 = 0.0000000000 0.0000000000 + t = 6.997138897 + -0.9991606715 t = 6.997138897 + -0.9991606715 Combine like terms: 6.997138897 + -0.9991606715 = 5.9979782255 t = 5.9979782255 Simplifying t = 5.9979782255

Subproblem 2

t + 0.9991606715 = -6.997138897 Simplifying t + 0.9991606715 = -6.997138897 Reorder the terms: 0.9991606715 + t = -6.997138897 Solving 0.9991606715 + t = -6.997138897 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.9991606715' to each side of the equation. 0.9991606715 + -0.9991606715 + t = -6.997138897 + -0.9991606715 Combine like terms: 0.9991606715 + -0.9991606715 = 0.0000000000 0.0000000000 + t = -6.997138897 + -0.9991606715 t = -6.997138897 + -0.9991606715 Combine like terms: -6.997138897 + -0.9991606715 = -7.9962995685 t = -7.9962995685 Simplifying t = -7.9962995685

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.9979782255, -7.9962995685}

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