20x+x^2=122

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Solution for 20x+x^2=122 equation:


Simplifying
20x + x2 = 122

Solving
20x + x2 = 122

Solving for variable 'x'.

Reorder the terms:
-122 + 20x + x2 = 122 + -122

Combine like terms: 122 + -122 = 0
-122 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '122' to each side of the equation.
-122 + 20x + 122 + x2 = 0 + 122

Reorder the terms:
-122 + 122 + 20x + x2 = 0 + 122

Combine like terms: -122 + 122 = 0
0 + 20x + x2 = 0 + 122
20x + x2 = 0 + 122

Combine like terms: 0 + 122 = 122
20x + x2 = 122

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 = 122 + 100

Reorder the terms:
100 + 20x + x2 = 122 + 100

Combine like terms: 122 + 100 = 222
100 + 20x + x2 = 222

Factor a perfect square on the left side:
(x + 10)(x + 10) = 222

Calculate the square root of the right side: 14.899664426

Break this problem into two subproblems by setting 
(x + 10) equal to 14.899664426 and -14.899664426.

Subproblem 1

x + 10 = 14.899664426 Simplifying x + 10 = 14.899664426 Reorder the terms: 10 + x = 14.899664426 Solving 10 + x = 14.899664426 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 = 14.899664426 + -10 Combine like terms: 10 + -10 = 0 0 + x = 14.899664426 + -10 x = 14.899664426 + -10 Combine like terms: 14.899664426 + -10 = 4.899664426 x = 4.899664426 Simplifying x = 4.899664426

Subproblem 2

x + 10 = -14.899664426 Simplifying x + 10 = -14.899664426 Reorder the terms: 10 + x = -14.899664426 Solving 10 + x = -14.899664426 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 = -14.899664426 + -10 Combine like terms: 10 + -10 = 0 0 + x = -14.899664426 + -10 x = -14.899664426 + -10 Combine like terms: -14.899664426 + -10 = -24.899664426 x = -24.899664426 Simplifying x = -24.899664426

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.899664426, -24.899664426}

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