5t^2+12t-60=0

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Solution for 5t^2+12t-60=0 equation:


Simplifying
5t2 + 12t + -60 = 0

Reorder the terms:
-60 + 12t + 5t2 = 0

Solving
-60 + 12t + 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'.
-12 + 2.4t + t2 = 0

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + 2.4t + 12 + t2 = 0 + 12

Reorder the terms:
-12 + 12 + 2.4t + t2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 2.4t + t2 = 0 + 12
2.4t + t2 = 0 + 12

Combine like terms: 0 + 12 = 12
2.4t + t2 = 12

The t term is 2.4t.  Take half its coefficient (1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
2.4t + 1.44 + t2 = 12 + 1.44

Reorder the terms:
1.44 + 2.4t + t2 = 12 + 1.44

Combine like terms: 12 + 1.44 = 13.44
1.44 + 2.4t + t2 = 13.44

Factor a perfect square on the left side:
(t + 1.2)(t + 1.2) = 13.44

Calculate the square root of the right side: 3.666060556

Break this problem into two subproblems by setting 
(t + 1.2) equal to 3.666060556 and -3.666060556.

Subproblem 1

t + 1.2 = 3.666060556 Simplifying t + 1.2 = 3.666060556 Reorder the terms: 1.2 + t = 3.666060556 Solving 1.2 + t = 3.666060556 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + t = 3.666060556 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + t = 3.666060556 + -1.2 t = 3.666060556 + -1.2 Combine like terms: 3.666060556 + -1.2 = 2.466060556 t = 2.466060556 Simplifying t = 2.466060556

Subproblem 2

t + 1.2 = -3.666060556 Simplifying t + 1.2 = -3.666060556 Reorder the terms: 1.2 + t = -3.666060556 Solving 1.2 + t = -3.666060556 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + t = -3.666060556 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + t = -3.666060556 + -1.2 t = -3.666060556 + -1.2 Combine like terms: -3.666060556 + -1.2 = -4.866060556 t = -4.866060556 Simplifying t = -4.866060556

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.466060556, -4.866060556}

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