t^2+20t-64=0

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Solution for t^2+20t-64=0 equation:


Simplifying
t2 + 20t + -64 = 0

Reorder the terms:
-64 + 20t + t2 = 0

Solving
-64 + 20t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '64' to each side of the equation.
-64 + 20t + 64 + t2 = 0 + 64

Reorder the terms:
-64 + 64 + 20t + t2 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + 20t + t2 = 0 + 64
20t + t2 = 0 + 64

Combine like terms: 0 + 64 = 64
20t + t2 = 64

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 = 64 + 100

Reorder the terms:
100 + 20t + t2 = 64 + 100

Combine like terms: 64 + 100 = 164
100 + 20t + t2 = 164

Factor a perfect square on the left side:
(t + 10)(t + 10) = 164

Calculate the square root of the right side: 12.806248475

Break this problem into two subproblems by setting 
(t + 10) equal to 12.806248475 and -12.806248475.

Subproblem 1

t + 10 = 12.806248475 Simplifying t + 10 = 12.806248475 Reorder the terms: 10 + t = 12.806248475 Solving 10 + t = 12.806248475 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 = 12.806248475 + -10 Combine like terms: 10 + -10 = 0 0 + t = 12.806248475 + -10 t = 12.806248475 + -10 Combine like terms: 12.806248475 + -10 = 2.806248475 t = 2.806248475 Simplifying t = 2.806248475

Subproblem 2

t + 10 = -12.806248475 Simplifying t + 10 = -12.806248475 Reorder the terms: 10 + t = -12.806248475 Solving 10 + t = -12.806248475 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 = -12.806248475 + -10 Combine like terms: 10 + -10 = 0 0 + t = -12.806248475 + -10 t = -12.806248475 + -10 Combine like terms: -12.806248475 + -10 = -22.806248475 t = -22.806248475 Simplifying t = -22.806248475

Solution

The solution to the problem is based on the solutions from the subproblems. t = {2.806248475, -22.806248475}

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