x^2-90x+336=0

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Solution for x^2-90x+336=0 equation:


Simplifying
x2 + -90x + 336 = 0

Reorder the terms:
336 + -90x + x2 = 0

Solving
336 + -90x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-336' to each side of the equation.
336 + -90x + -336 + x2 = 0 + -336

Reorder the terms:
336 + -336 + -90x + x2 = 0 + -336

Combine like terms: 336 + -336 = 0
0 + -90x + x2 = 0 + -336
-90x + x2 = 0 + -336

Combine like terms: 0 + -336 = -336
-90x + x2 = -336

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 = -336 + 2025

Reorder the terms:
2025 + -90x + x2 = -336 + 2025

Combine like terms: -336 + 2025 = 1689
2025 + -90x + x2 = 1689

Factor a perfect square on the left side:
(x + -45)(x + -45) = 1689

Calculate the square root of the right side: 41.097445176

Break this problem into two subproblems by setting 
(x + -45) equal to 41.097445176 and -41.097445176.

Subproblem 1

x + -45 = 41.097445176 Simplifying x + -45 = 41.097445176 Reorder the terms: -45 + x = 41.097445176 Solving -45 + x = 41.097445176 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 = 41.097445176 + 45 Combine like terms: -45 + 45 = 0 0 + x = 41.097445176 + 45 x = 41.097445176 + 45 Combine like terms: 41.097445176 + 45 = 86.097445176 x = 86.097445176 Simplifying x = 86.097445176

Subproblem 2

x + -45 = -41.097445176 Simplifying x + -45 = -41.097445176 Reorder the terms: -45 + x = -41.097445176 Solving -45 + x = -41.097445176 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 = -41.097445176 + 45 Combine like terms: -45 + 45 = 0 0 + x = -41.097445176 + 45 x = -41.097445176 + 45 Combine like terms: -41.097445176 + 45 = 3.902554824 x = 3.902554824 Simplifying x = 3.902554824

Solution

The solution to the problem is based on the solutions from the subproblems. x = {86.097445176, 3.902554824}

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