x^2-690x=1248

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Solution for x^2-690x=1248 equation:


Simplifying
x2 + -690x = 1248

Reorder the terms:
-690x + x2 = 1248

Solving
-690x + x2 = 1248

Solving for variable 'x'.

Reorder the terms:
-1248 + -690x + x2 = 1248 + -1248

Combine like terms: 1248 + -1248 = 0
-1248 + -690x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1248' to each side of the equation.
-1248 + -690x + 1248 + x2 = 0 + 1248

Reorder the terms:
-1248 + 1248 + -690x + x2 = 0 + 1248

Combine like terms: -1248 + 1248 = 0
0 + -690x + x2 = 0 + 1248
-690x + x2 = 0 + 1248

Combine like terms: 0 + 1248 = 1248
-690x + x2 = 1248

The x term is -690x.  Take half its coefficient (-345).
Square it (119025) and add it to both sides.

Add '119025' to each side of the equation.
-690x + 119025 + x2 = 1248 + 119025

Reorder the terms:
119025 + -690x + x2 = 1248 + 119025

Combine like terms: 1248 + 119025 = 120273
119025 + -690x + x2 = 120273

Factor a perfect square on the left side:
(x + -345)(x + -345) = 120273

Calculate the square root of the right side: 346.803979216

Break this problem into two subproblems by setting 
(x + -345) equal to 346.803979216 and -346.803979216.

Subproblem 1

x + -345 = 346.803979216 Simplifying x + -345 = 346.803979216 Reorder the terms: -345 + x = 346.803979216 Solving -345 + x = 346.803979216 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '345' to each side of the equation. -345 + 345 + x = 346.803979216 + 345 Combine like terms: -345 + 345 = 0 0 + x = 346.803979216 + 345 x = 346.803979216 + 345 Combine like terms: 346.803979216 + 345 = 691.803979216 x = 691.803979216 Simplifying x = 691.803979216

Subproblem 2

x + -345 = -346.803979216 Simplifying x + -345 = -346.803979216 Reorder the terms: -345 + x = -346.803979216 Solving -345 + x = -346.803979216 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '345' to each side of the equation. -345 + 345 + x = -346.803979216 + 345 Combine like terms: -345 + 345 = 0 0 + x = -346.803979216 + 345 x = -346.803979216 + 345 Combine like terms: -346.803979216 + 345 = -1.803979216 x = -1.803979216 Simplifying x = -1.803979216

Solution

The solution to the problem is based on the solutions from the subproblems. x = {691.803979216, -1.803979216}

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