x(x+30)=150

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Solution for x(x+30)=150 equation:


Simplifying
x(x + 30) = 150

Reorder the terms:
x(30 + x) = 150
(30 * x + x * x) = 150
(30x + x2) = 150

Solving
30x + x2 = 150

Solving for variable 'x'.

Reorder the terms:
-150 + 30x + x2 = 150 + -150

Combine like terms: 150 + -150 = 0
-150 + 30x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '150' to each side of the equation.
-150 + 30x + 150 + x2 = 0 + 150

Reorder the terms:
-150 + 150 + 30x + x2 = 0 + 150

Combine like terms: -150 + 150 = 0
0 + 30x + x2 = 0 + 150
30x + x2 = 0 + 150

Combine like terms: 0 + 150 = 150
30x + x2 = 150

The x term is 30x.  Take half its coefficient (15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
30x + 225 + x2 = 150 + 225

Reorder the terms:
225 + 30x + x2 = 150 + 225

Combine like terms: 150 + 225 = 375
225 + 30x + x2 = 375

Factor a perfect square on the left side:
(x + 15)(x + 15) = 375

Calculate the square root of the right side: 19.364916731

Break this problem into two subproblems by setting 
(x + 15) equal to 19.364916731 and -19.364916731.

Subproblem 1

x + 15 = 19.364916731 Simplifying x + 15 = 19.364916731 Reorder the terms: 15 + x = 19.364916731 Solving 15 + x = 19.364916731 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = 19.364916731 + -15 Combine like terms: 15 + -15 = 0 0 + x = 19.364916731 + -15 x = 19.364916731 + -15 Combine like terms: 19.364916731 + -15 = 4.364916731 x = 4.364916731 Simplifying x = 4.364916731

Subproblem 2

x + 15 = -19.364916731 Simplifying x + 15 = -19.364916731 Reorder the terms: 15 + x = -19.364916731 Solving 15 + x = -19.364916731 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + x = -19.364916731 + -15 Combine like terms: 15 + -15 = 0 0 + x = -19.364916731 + -15 x = -19.364916731 + -15 Combine like terms: -19.364916731 + -15 = -34.364916731 x = -34.364916731 Simplifying x = -34.364916731

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.364916731, -34.364916731}

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