-5t^2+60t+74=0

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Solution for -5t^2+60t+74=0 equation:


Simplifying
-5t2 + 60t + 74 = 0

Reorder the terms:
74 + 60t + -5t2 = 0

Solving
74 + 60t + -5t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-14.8 + -12t + t2 = 0

Move the constant term to the right:

Add '14.8' to each side of the equation.
-14.8 + -12t + 14.8 + t2 = 0 + 14.8

Reorder the terms:
-14.8 + 14.8 + -12t + t2 = 0 + 14.8

Combine like terms: -14.8 + 14.8 = 0.0
0.0 + -12t + t2 = 0 + 14.8
-12t + t2 = 0 + 14.8

Combine like terms: 0 + 14.8 = 14.8
-12t + t2 = 14.8

The t term is -12t.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12t + 36 + t2 = 14.8 + 36

Reorder the terms:
36 + -12t + t2 = 14.8 + 36

Combine like terms: 14.8 + 36 = 50.8
36 + -12t + t2 = 50.8

Factor a perfect square on the left side:
(t + -6)(t + -6) = 50.8

Calculate the square root of the right side: 7.127411872

Break this problem into two subproblems by setting 
(t + -6) equal to 7.127411872 and -7.127411872.

Subproblem 1

t + -6 = 7.127411872 Simplifying t + -6 = 7.127411872 Reorder the terms: -6 + t = 7.127411872 Solving -6 + t = 7.127411872 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + t = 7.127411872 + 6 Combine like terms: -6 + 6 = 0 0 + t = 7.127411872 + 6 t = 7.127411872 + 6 Combine like terms: 7.127411872 + 6 = 13.127411872 t = 13.127411872 Simplifying t = 13.127411872

Subproblem 2

t + -6 = -7.127411872 Simplifying t + -6 = -7.127411872 Reorder the terms: -6 + t = -7.127411872 Solving -6 + t = -7.127411872 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + t = -7.127411872 + 6 Combine like terms: -6 + 6 = 0 0 + t = -7.127411872 + 6 t = -7.127411872 + 6 Combine like terms: -7.127411872 + 6 = -1.127411872 t = -1.127411872 Simplifying t = -1.127411872

Solution

The solution to the problem is based on the solutions from the subproblems. t = {13.127411872, -1.127411872}

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