t^2-20t-60=0

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Solution for t^2-20t-60=0 equation:


Simplifying
t2 + -20t + -60 = 0

Reorder the terms:
-60 + -20t + t2 = 0

Solving
-60 + -20t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '60' to each side of the equation.
-60 + -20t + 60 + t2 = 0 + 60

Reorder the terms:
-60 + 60 + -20t + t2 = 0 + 60

Combine like terms: -60 + 60 = 0
0 + -20t + t2 = 0 + 60
-20t + t2 = 0 + 60

Combine like terms: 0 + 60 = 60
-20t + t2 = 60

The t term is -20t.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20t + 100 + t2 = 60 + 100

Reorder the terms:
100 + -20t + t2 = 60 + 100

Combine like terms: 60 + 100 = 160
100 + -20t + t2 = 160

Factor a perfect square on the left side:
(t + -10)(t + -10) = 160

Calculate the square root of the right side: 12.649110641

Break this problem into two subproblems by setting 
(t + -10) equal to 12.649110641 and -12.649110641.

Subproblem 1

t + -10 = 12.649110641 Simplifying t + -10 = 12.649110641 Reorder the terms: -10 + t = 12.649110641 Solving -10 + t = 12.649110641 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = 12.649110641 + 10 Combine like terms: -10 + 10 = 0 0 + t = 12.649110641 + 10 t = 12.649110641 + 10 Combine like terms: 12.649110641 + 10 = 22.649110641 t = 22.649110641 Simplifying t = 22.649110641

Subproblem 2

t + -10 = -12.649110641 Simplifying t + -10 = -12.649110641 Reorder the terms: -10 + t = -12.649110641 Solving -10 + t = -12.649110641 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + t = -12.649110641 + 10 Combine like terms: -10 + 10 = 0 0 + t = -12.649110641 + 10 t = -12.649110641 + 10 Combine like terms: -12.649110641 + 10 = -2.649110641 t = -2.649110641 Simplifying t = -2.649110641

Solution

The solution to the problem is based on the solutions from the subproblems. t = {22.649110641, -2.649110641}

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