2X^2+20X=525

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Solution for 2X^2+20X=525 equation:


Simplifying
2X2 + 20X = 525

Reorder the terms:
20X + 2X2 = 525

Solving
20X + 2X2 = 525

Solving for variable 'X'.

Reorder the terms:
-525 + 20X + 2X2 = 525 + -525

Combine like terms: 525 + -525 = 0
-525 + 20X + 2X2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-262.5 + 10X + X2 = 0

Move the constant term to the right:

Add '262.5' to each side of the equation.
-262.5 + 10X + 262.5 + X2 = 0 + 262.5

Reorder the terms:
-262.5 + 262.5 + 10X + X2 = 0 + 262.5

Combine like terms: -262.5 + 262.5 = 0.0
0.0 + 10X + X2 = 0 + 262.5
10X + X2 = 0 + 262.5

Combine like terms: 0 + 262.5 = 262.5
10X + X2 = 262.5

The X term is 10X.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10X + 25 + X2 = 262.5 + 25

Reorder the terms:
25 + 10X + X2 = 262.5 + 25

Combine like terms: 262.5 + 25 = 287.5
25 + 10X + X2 = 287.5

Factor a perfect square on the left side:
(X + 5)(X + 5) = 287.5

Calculate the square root of the right side: 16.955824958

Break this problem into two subproblems by setting 
(X + 5) equal to 16.955824958 and -16.955824958.

Subproblem 1

X + 5 = 16.955824958 Simplifying X + 5 = 16.955824958 Reorder the terms: 5 + X = 16.955824958 Solving 5 + X = 16.955824958 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + X = 16.955824958 + -5 Combine like terms: 5 + -5 = 0 0 + X = 16.955824958 + -5 X = 16.955824958 + -5 Combine like terms: 16.955824958 + -5 = 11.955824958 X = 11.955824958 Simplifying X = 11.955824958

Subproblem 2

X + 5 = -16.955824958 Simplifying X + 5 = -16.955824958 Reorder the terms: 5 + X = -16.955824958 Solving 5 + X = -16.955824958 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + X = -16.955824958 + -5 Combine like terms: 5 + -5 = 0 0 + X = -16.955824958 + -5 X = -16.955824958 + -5 Combine like terms: -16.955824958 + -5 = -21.955824958 X = -21.955824958 Simplifying X = -21.955824958

Solution

The solution to the problem is based on the solutions from the subproblems. X = {11.955824958, -21.955824958}

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