230=90x-x^2

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Solution for 230=90x-x^2 equation:


Simplifying
230 = 90x + -1x2

Solving
230 = 90x + -1x2

Solving for variable 'x'.

Reorder the terms:
230 + -90x + x2 = 90x + -90x + -1x2 + x2

Combine like terms: 90x + -90x = 0
230 + -90x + x2 = 0 + -1x2 + x2
230 + -90x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
230 + -90x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-230' to each side of the equation.
230 + -90x + -230 + x2 = 0 + -230

Reorder the terms:
230 + -230 + -90x + x2 = 0 + -230

Combine like terms: 230 + -230 = 0
0 + -90x + x2 = 0 + -230
-90x + x2 = 0 + -230

Combine like terms: 0 + -230 = -230
-90x + x2 = -230

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 = -230 + 2025

Reorder the terms:
2025 + -90x + x2 = -230 + 2025

Combine like terms: -230 + 2025 = 1795
2025 + -90x + x2 = 1795

Factor a perfect square on the left side:
(x + -45)(x + -45) = 1795

Calculate the square root of the right side: 42.367440329

Break this problem into two subproblems by setting 
(x + -45) equal to 42.367440329 and -42.367440329.

Subproblem 1

x + -45 = 42.367440329 Simplifying x + -45 = 42.367440329 Reorder the terms: -45 + x = 42.367440329 Solving -45 + x = 42.367440329 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 = 42.367440329 + 45 Combine like terms: -45 + 45 = 0 0 + x = 42.367440329 + 45 x = 42.367440329 + 45 Combine like terms: 42.367440329 + 45 = 87.367440329 x = 87.367440329 Simplifying x = 87.367440329

Subproblem 2

x + -45 = -42.367440329 Simplifying x + -45 = -42.367440329 Reorder the terms: -45 + x = -42.367440329 Solving -45 + x = -42.367440329 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 = -42.367440329 + 45 Combine like terms: -45 + 45 = 0 0 + x = -42.367440329 + 45 x = -42.367440329 + 45 Combine like terms: -42.367440329 + 45 = 2.632559671 x = 2.632559671 Simplifying x = 2.632559671

Solution

The solution to the problem is based on the solutions from the subproblems. x = {87.367440329, 2.632559671}

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