x(x+30)=190

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Solution for x(x+30)=190 equation:


Simplifying
x(x + 30) = 190

Reorder the terms:
x(30 + x) = 190
(30 * x + x * x) = 190
(30x + x2) = 190

Solving
30x + x2 = 190

Solving for variable 'x'.

Reorder the terms:
-190 + 30x + x2 = 190 + -190

Combine like terms: 190 + -190 = 0
-190 + 30x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '190' to each side of the equation.
-190 + 30x + 190 + x2 = 0 + 190

Reorder the terms:
-190 + 190 + 30x + x2 = 0 + 190

Combine like terms: -190 + 190 = 0
0 + 30x + x2 = 0 + 190
30x + x2 = 0 + 190

Combine like terms: 0 + 190 = 190
30x + x2 = 190

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 = 190 + 225

Reorder the terms:
225 + 30x + x2 = 190 + 225

Combine like terms: 190 + 225 = 415
225 + 30x + x2 = 415

Factor a perfect square on the left side:
(x + 15)(x + 15) = 415

Calculate the square root of the right side: 20.371548787

Break this problem into two subproblems by setting 
(x + 15) equal to 20.371548787 and -20.371548787.

Subproblem 1

x + 15 = 20.371548787 Simplifying x + 15 = 20.371548787 Reorder the terms: 15 + x = 20.371548787 Solving 15 + x = 20.371548787 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 = 20.371548787 + -15 Combine like terms: 15 + -15 = 0 0 + x = 20.371548787 + -15 x = 20.371548787 + -15 Combine like terms: 20.371548787 + -15 = 5.371548787 x = 5.371548787 Simplifying x = 5.371548787

Subproblem 2

x + 15 = -20.371548787 Simplifying x + 15 = -20.371548787 Reorder the terms: 15 + x = -20.371548787 Solving 15 + x = -20.371548787 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 = -20.371548787 + -15 Combine like terms: 15 + -15 = 0 0 + x = -20.371548787 + -15 x = -20.371548787 + -15 Combine like terms: -20.371548787 + -15 = -35.371548787 x = -35.371548787 Simplifying x = -35.371548787

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.371548787, -35.371548787}

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