x^2-90x-450=0

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Solution for x^2-90x-450=0 equation:


Simplifying
x2 + -90x + -450 = 0

Reorder the terms:
-450 + -90x + x2 = 0

Solving
-450 + -90x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '450' to each side of the equation.
-450 + -90x + 450 + x2 = 0 + 450

Reorder the terms:
-450 + 450 + -90x + x2 = 0 + 450

Combine like terms: -450 + 450 = 0
0 + -90x + x2 = 0 + 450
-90x + x2 = 0 + 450

Combine like terms: 0 + 450 = 450
-90x + x2 = 450

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

Add '2025' to each side of the equation.
-90x + 2025 + x2 = 450 + 2025

Reorder the terms:
2025 + -90x + x2 = 450 + 2025

Combine like terms: 450 + 2025 = 2475
2025 + -90x + x2 = 2475

Factor a perfect square on the left side:
(x + -45)(x + -45) = 2475

Calculate the square root of the right side: 49.749371855

Break this problem into two subproblems by setting 
(x + -45) equal to 49.749371855 and -49.749371855.

Subproblem 1

x + -45 = 49.749371855 Simplifying x + -45 = 49.749371855 Reorder the terms: -45 + x = 49.749371855 Solving -45 + x = 49.749371855 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 45 + x = 49.749371855 + 45 Combine like terms: -45 + 45 = 0 0 + x = 49.749371855 + 45 x = 49.749371855 + 45 Combine like terms: 49.749371855 + 45 = 94.749371855 x = 94.749371855 Simplifying x = 94.749371855

Subproblem 2

x + -45 = -49.749371855 Simplifying x + -45 = -49.749371855 Reorder the terms: -45 + x = -49.749371855 Solving -45 + x = -49.749371855 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '45' to each side of the equation. -45 + 45 + x = -49.749371855 + 45 Combine like terms: -45 + 45 = 0 0 + x = -49.749371855 + 45 x = -49.749371855 + 45 Combine like terms: -49.749371855 + 45 = -4.749371855 x = -4.749371855 Simplifying x = -4.749371855

Solution

The solution to the problem is based on the solutions from the subproblems. x = {94.749371855, -4.749371855}

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