t^2-90t-1100=0

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Solution for t^2-90t-1100=0 equation:


Simplifying
t2 + -90t + -1100 = 0

Reorder the terms:
-1100 + -90t + t2 = 0

Solving
-1100 + -90t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '1100' to each side of the equation.
-1100 + -90t + 1100 + t2 = 0 + 1100

Reorder the terms:
-1100 + 1100 + -90t + t2 = 0 + 1100

Combine like terms: -1100 + 1100 = 0
0 + -90t + t2 = 0 + 1100
-90t + t2 = 0 + 1100

Combine like terms: 0 + 1100 = 1100
-90t + t2 = 1100

The t term is -90t.  Take half its coefficient (-45).
Square it (2025) and add it to both sides.

Add '2025' to each side of the equation.
-90t + 2025 + t2 = 1100 + 2025

Reorder the terms:
2025 + -90t + t2 = 1100 + 2025

Combine like terms: 1100 + 2025 = 3125
2025 + -90t + t2 = 3125

Factor a perfect square on the left side:
(t + -45)(t + -45) = 3125

Calculate the square root of the right side: 55.901699437

Break this problem into two subproblems by setting 
(t + -45) equal to 55.901699437 and -55.901699437.

Subproblem 1

t + -45 = 55.901699437 Simplifying t + -45 = 55.901699437 Reorder the terms: -45 + t = 55.901699437 Solving -45 + t = 55.901699437 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 45 + t = 55.901699437 + 45 Combine like terms: -45 + 45 = 0 0 + t = 55.901699437 + 45 t = 55.901699437 + 45 Combine like terms: 55.901699437 + 45 = 100.901699437 t = 100.901699437 Simplifying t = 100.901699437

Subproblem 2

t + -45 = -55.901699437 Simplifying t + -45 = -55.901699437 Reorder the terms: -45 + t = -55.901699437 Solving -45 + t = -55.901699437 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 45 + t = -55.901699437 + 45 Combine like terms: -45 + 45 = 0 0 + t = -55.901699437 + 45 t = -55.901699437 + 45 Combine like terms: -55.901699437 + 45 = -10.901699437 t = -10.901699437 Simplifying t = -10.901699437

Solution

The solution to the problem is based on the solutions from the subproblems. t = {100.901699437, -10.901699437}

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