x^2+90x-2025=0

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Solution for x^2+90x-2025=0 equation:


Simplifying
x2 + 90x + -2025 = 0

Reorder the terms:
-2025 + 90x + x2 = 0

Solving
-2025 + 90x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '2025' to each side of the equation.
-2025 + 90x + 2025 + x2 = 0 + 2025

Reorder the terms:
-2025 + 2025 + 90x + x2 = 0 + 2025

Combine like terms: -2025 + 2025 = 0
0 + 90x + x2 = 0 + 2025
90x + x2 = 0 + 2025

Combine like terms: 0 + 2025 = 2025
90x + x2 = 2025

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 = 2025 + 2025

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

Combine like terms: 2025 + 2025 = 4050
2025 + 90x + x2 = 4050

Factor a perfect square on the left side:
(x + 45)(x + 45) = 4050

Calculate the square root of the right side: 63.639610307

Break this problem into two subproblems by setting 
(x + 45) equal to 63.639610307 and -63.639610307.

Subproblem 1

x + 45 = 63.639610307 Simplifying x + 45 = 63.639610307 Reorder the terms: 45 + x = 63.639610307 Solving 45 + x = 63.639610307 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 = 63.639610307 + -45 Combine like terms: 45 + -45 = 0 0 + x = 63.639610307 + -45 x = 63.639610307 + -45 Combine like terms: 63.639610307 + -45 = 18.639610307 x = 18.639610307 Simplifying x = 18.639610307

Subproblem 2

x + 45 = -63.639610307 Simplifying x + 45 = -63.639610307 Reorder the terms: 45 + x = -63.639610307 Solving 45 + x = -63.639610307 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 = -63.639610307 + -45 Combine like terms: 45 + -45 = 0 0 + x = -63.639610307 + -45 x = -63.639610307 + -45 Combine like terms: -63.639610307 + -45 = -108.639610307 x = -108.639610307 Simplifying x = -108.639610307

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.639610307, -108.639610307}

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