1220=x(150+x)

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Solution for 1220=x(150+x) equation:


Simplifying
1220 = x(150 + x)
1220 = (150 * x + x * x)
1220 = (150x + x2)

Solving
1220 = 150x + x2

Solving for variable 'x'.

Reorder the terms:
1220 + -150x + -1x2 = 150x + -150x + x2 + -1x2

Combine like terms: 150x + -150x = 0
1220 + -150x + -1x2 = 0 + x2 + -1x2
1220 + -150x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
1220 + -150x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-1220 + 150x + x2 = 0

Move the constant term to the right:

Add '1220' to each side of the equation.
-1220 + 150x + 1220 + x2 = 0 + 1220

Reorder the terms:
-1220 + 1220 + 150x + x2 = 0 + 1220

Combine like terms: -1220 + 1220 = 0
0 + 150x + x2 = 0 + 1220
150x + x2 = 0 + 1220

Combine like terms: 0 + 1220 = 1220
150x + x2 = 1220

The x term is 150x.  Take half its coefficient (75).
Square it (5625) and add it to both sides.

Add '5625' to each side of the equation.
150x + 5625 + x2 = 1220 + 5625

Reorder the terms:
5625 + 150x + x2 = 1220 + 5625

Combine like terms: 1220 + 5625 = 6845
5625 + 150x + x2 = 6845

Factor a perfect square on the left side:
(x + 75)(x + 75) = 6845

Calculate the square root of the right side: 82.734515167

Break this problem into two subproblems by setting 
(x + 75) equal to 82.734515167 and -82.734515167.

Subproblem 1

x + 75 = 82.734515167 Simplifying x + 75 = 82.734515167 Reorder the terms: 75 + x = 82.734515167 Solving 75 + x = 82.734515167 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-75' to each side of the equation. 75 + -75 + x = 82.734515167 + -75 Combine like terms: 75 + -75 = 0 0 + x = 82.734515167 + -75 x = 82.734515167 + -75 Combine like terms: 82.734515167 + -75 = 7.734515167 x = 7.734515167 Simplifying x = 7.734515167

Subproblem 2

x + 75 = -82.734515167 Simplifying x + 75 = -82.734515167 Reorder the terms: 75 + x = -82.734515167 Solving 75 + x = -82.734515167 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-75' to each side of the equation. 75 + -75 + x = -82.734515167 + -75 Combine like terms: 75 + -75 = 0 0 + x = -82.734515167 + -75 x = -82.734515167 + -75 Combine like terms: -82.734515167 + -75 = -157.734515167 x = -157.734515167 Simplifying x = -157.734515167

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.734515167, -157.734515167}

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