20x+x^2=1260

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Solution for 20x+x^2=1260 equation:


Simplifying
20x + x2 = 1260

Solving
20x + x2 = 1260

Solving for variable 'x'.

Reorder the terms:
-1260 + 20x + x2 = 1260 + -1260

Combine like terms: 1260 + -1260 = 0
-1260 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1260' to each side of the equation.
-1260 + 20x + 1260 + x2 = 0 + 1260

Reorder the terms:
-1260 + 1260 + 20x + x2 = 0 + 1260

Combine like terms: -1260 + 1260 = 0
0 + 20x + x2 = 0 + 1260
20x + x2 = 0 + 1260

Combine like terms: 0 + 1260 = 1260
20x + x2 = 1260

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 = 1260 + 100

Reorder the terms:
100 + 20x + x2 = 1260 + 100

Combine like terms: 1260 + 100 = 1360
100 + 20x + x2 = 1360

Factor a perfect square on the left side:
(x + 10)(x + 10) = 1360

Calculate the square root of the right side: 36.878177829

Break this problem into two subproblems by setting 
(x + 10) equal to 36.878177829 and -36.878177829.

Subproblem 1

x + 10 = 36.878177829 Simplifying x + 10 = 36.878177829 Reorder the terms: 10 + x = 36.878177829 Solving 10 + x = 36.878177829 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 = 36.878177829 + -10 Combine like terms: 10 + -10 = 0 0 + x = 36.878177829 + -10 x = 36.878177829 + -10 Combine like terms: 36.878177829 + -10 = 26.878177829 x = 26.878177829 Simplifying x = 26.878177829

Subproblem 2

x + 10 = -36.878177829 Simplifying x + 10 = -36.878177829 Reorder the terms: 10 + x = -36.878177829 Solving 10 + x = -36.878177829 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 = -36.878177829 + -10 Combine like terms: 10 + -10 = 0 0 + x = -36.878177829 + -10 x = -36.878177829 + -10 Combine like terms: -36.878177829 + -10 = -46.878177829 x = -46.878177829 Simplifying x = -46.878177829

Solution

The solution to the problem is based on the solutions from the subproblems. x = {26.878177829, -46.878177829}

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