x^2+20x-350=0

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Solution for x^2+20x-350=0 equation:


Simplifying
x2 + 20x + -350 = 0

Reorder the terms:
-350 + 20x + x2 = 0

Solving
-350 + 20x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '350' to each side of the equation.
-350 + 20x + 350 + x2 = 0 + 350

Reorder the terms:
-350 + 350 + 20x + x2 = 0 + 350

Combine like terms: -350 + 350 = 0
0 + 20x + x2 = 0 + 350
20x + x2 = 0 + 350

Combine like terms: 0 + 350 = 350
20x + x2 = 350

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = 350 + 100

Reorder the terms:
100 + 20x + x2 = 350 + 100

Combine like terms: 350 + 100 = 450
100 + 20x + x2 = 450

Factor a perfect square on the left side:
(x + 10)(x + 10) = 450

Calculate the square root of the right side: 21.213203436

Break this problem into two subproblems by setting 
(x + 10) equal to 21.213203436 and -21.213203436.

Subproblem 1

x + 10 = 21.213203436 Simplifying x + 10 = 21.213203436 Reorder the terms: 10 + x = 21.213203436 Solving 10 + x = 21.213203436 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 21.213203436 + -10 Combine like terms: 10 + -10 = 0 0 + x = 21.213203436 + -10 x = 21.213203436 + -10 Combine like terms: 21.213203436 + -10 = 11.213203436 x = 11.213203436 Simplifying x = 11.213203436

Subproblem 2

x + 10 = -21.213203436 Simplifying x + 10 = -21.213203436 Reorder the terms: 10 + x = -21.213203436 Solving 10 + x = -21.213203436 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -21.213203436 + -10 Combine like terms: 10 + -10 = 0 0 + x = -21.213203436 + -10 x = -21.213203436 + -10 Combine like terms: -21.213203436 + -10 = -31.213203436 x = -31.213203436 Simplifying x = -31.213203436

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.213203436, -31.213203436}

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