x^2+90x=2925

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Solution for x^2+90x=2925 equation:


Simplifying
x2 + 90x = 2925

Reorder the terms:
90x + x2 = 2925

Solving
90x + x2 = 2925

Solving for variable 'x'.

Reorder the terms:
-2925 + 90x + x2 = 2925 + -2925

Combine like terms: 2925 + -2925 = 0
-2925 + 90x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2925' to each side of the equation.
-2925 + 90x + 2925 + x2 = 0 + 2925

Reorder the terms:
-2925 + 2925 + 90x + x2 = 0 + 2925

Combine like terms: -2925 + 2925 = 0
0 + 90x + x2 = 0 + 2925
90x + x2 = 0 + 2925

Combine like terms: 0 + 2925 = 2925
90x + x2 = 2925

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 = 2925 + 2025

Reorder the terms:
2025 + 90x + x2 = 2925 + 2025

Combine like terms: 2925 + 2025 = 4950
2025 + 90x + x2 = 4950

Factor a perfect square on the left side:
(x + 45)(x + 45) = 4950

Calculate the square root of the right side: 70.356236397

Break this problem into two subproblems by setting 
(x + 45) equal to 70.356236397 and -70.356236397.

Subproblem 1

x + 45 = 70.356236397 Simplifying x + 45 = 70.356236397 Reorder the terms: 45 + x = 70.356236397 Solving 45 + x = 70.356236397 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 = 70.356236397 + -45 Combine like terms: 45 + -45 = 0 0 + x = 70.356236397 + -45 x = 70.356236397 + -45 Combine like terms: 70.356236397 + -45 = 25.356236397 x = 25.356236397 Simplifying x = 25.356236397

Subproblem 2

x + 45 = -70.356236397 Simplifying x + 45 = -70.356236397 Reorder the terms: 45 + x = -70.356236397 Solving 45 + x = -70.356236397 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 = -70.356236397 + -45 Combine like terms: 45 + -45 = 0 0 + x = -70.356236397 + -45 x = -70.356236397 + -45 Combine like terms: -70.356236397 + -45 = -115.356236397 x = -115.356236397 Simplifying x = -115.356236397

Solution

The solution to the problem is based on the solutions from the subproblems. x = {25.356236397, -115.356236397}

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