x^2+6x=630

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Solution for x^2+6x=630 equation:


Simplifying
x2 + 6x = 630

Reorder the terms:
6x + x2 = 630

Solving
6x + x2 = 630

Solving for variable 'x'.

Reorder the terms:
-630 + 6x + x2 = 630 + -630

Combine like terms: 630 + -630 = 0
-630 + 6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '630' to each side of the equation.
-630 + 6x + 630 + x2 = 0 + 630

Reorder the terms:
-630 + 630 + 6x + x2 = 0 + 630

Combine like terms: -630 + 630 = 0
0 + 6x + x2 = 0 + 630
6x + x2 = 0 + 630

Combine like terms: 0 + 630 = 630
6x + x2 = 630

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = 630 + 9

Reorder the terms:
9 + 6x + x2 = 630 + 9

Combine like terms: 630 + 9 = 639
9 + 6x + x2 = 639

Factor a perfect square on the left side:
(x + 3)(x + 3) = 639

Calculate the square root of the right side: 25.27844932

Break this problem into two subproblems by setting 
(x + 3) equal to 25.27844932 and -25.27844932.

Subproblem 1

x + 3 = 25.27844932 Simplifying x + 3 = 25.27844932 Reorder the terms: 3 + x = 25.27844932 Solving 3 + x = 25.27844932 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 25.27844932 + -3 Combine like terms: 3 + -3 = 0 0 + x = 25.27844932 + -3 x = 25.27844932 + -3 Combine like terms: 25.27844932 + -3 = 22.27844932 x = 22.27844932 Simplifying x = 22.27844932

Subproblem 2

x + 3 = -25.27844932 Simplifying x + 3 = -25.27844932 Reorder the terms: 3 + x = -25.27844932 Solving 3 + x = -25.27844932 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -25.27844932 + -3 Combine like terms: 3 + -3 = 0 0 + x = -25.27844932 + -3 x = -25.27844932 + -3 Combine like terms: -25.27844932 + -3 = -28.27844932 x = -28.27844932 Simplifying x = -28.27844932

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.27844932, -28.27844932}

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