x(x+10)=528

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Solution for x(x+10)=528 equation:


Simplifying
x(x + 10) = 528

Reorder the terms:
x(10 + x) = 528
(10 * x + x * x) = 528
(10x + x2) = 528

Solving
10x + x2 = 528

Solving for variable 'x'.

Reorder the terms:
-528 + 10x + x2 = 528 + -528

Combine like terms: 528 + -528 = 0
-528 + 10x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '528' to each side of the equation.
-528 + 10x + 528 + x2 = 0 + 528

Reorder the terms:
-528 + 528 + 10x + x2 = 0 + 528

Combine like terms: -528 + 528 = 0
0 + 10x + x2 = 0 + 528
10x + x2 = 0 + 528

Combine like terms: 0 + 528 = 528
10x + x2 = 528

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 = 528 + 25

Reorder the terms:
25 + 10x + x2 = 528 + 25

Combine like terms: 528 + 25 = 553
25 + 10x + x2 = 553

Factor a perfect square on the left side:
(x + 5)(x + 5) = 553

Calculate the square root of the right side: 23.515952033

Break this problem into two subproblems by setting 
(x + 5) equal to 23.515952033 and -23.515952033.

Subproblem 1

x + 5 = 23.515952033 Simplifying x + 5 = 23.515952033 Reorder the terms: 5 + x = 23.515952033 Solving 5 + x = 23.515952033 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 = 23.515952033 + -5 Combine like terms: 5 + -5 = 0 0 + x = 23.515952033 + -5 x = 23.515952033 + -5 Combine like terms: 23.515952033 + -5 = 18.515952033 x = 18.515952033 Simplifying x = 18.515952033

Subproblem 2

x + 5 = -23.515952033 Simplifying x + 5 = -23.515952033 Reorder the terms: 5 + x = -23.515952033 Solving 5 + x = -23.515952033 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 = -23.515952033 + -5 Combine like terms: 5 + -5 = 0 0 + x = -23.515952033 + -5 x = -23.515952033 + -5 Combine like terms: -23.515952033 + -5 = -28.515952033 x = -28.515952033 Simplifying x = -28.515952033

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.515952033, -28.515952033}

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