(x)(x+20)=3000

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Solution for (x)(x+20)=3000 equation:


Simplifying
(x)(x + 20) = 3000

Reorder the terms:
x(20 + x) = 3000
(20 * x + x * x) = 3000
(20x + x2) = 3000

Solving
20x + x2 = 3000

Solving for variable 'x'.

Reorder the terms:
-3000 + 20x + x2 = 3000 + -3000

Combine like terms: 3000 + -3000 = 0
-3000 + 20x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3000' to each side of the equation.
-3000 + 20x + 3000 + x2 = 0 + 3000

Reorder the terms:
-3000 + 3000 + 20x + x2 = 0 + 3000

Combine like terms: -3000 + 3000 = 0
0 + 20x + x2 = 0 + 3000
20x + x2 = 0 + 3000

Combine like terms: 0 + 3000 = 3000
20x + x2 = 3000

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = 3000 + 100

Reorder the terms:
100 + 20x + x2 = 3000 + 100

Combine like terms: 3000 + 100 = 3100
100 + 20x + x2 = 3100

Factor a perfect square on the left side:
(x + 10)(x + 10) = 3100

Calculate the square root of the right side: 55.677643628

Break this problem into two subproblems by setting 
(x + 10) equal to 55.677643628 and -55.677643628.

Subproblem 1

x + 10 = 55.677643628 Simplifying x + 10 = 55.677643628 Reorder the terms: 10 + x = 55.677643628 Solving 10 + x = 55.677643628 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 55.677643628 + -10 Combine like terms: 10 + -10 = 0 0 + x = 55.677643628 + -10 x = 55.677643628 + -10 Combine like terms: 55.677643628 + -10 = 45.677643628 x = 45.677643628 Simplifying x = 45.677643628

Subproblem 2

x + 10 = -55.677643628 Simplifying x + 10 = -55.677643628 Reorder the terms: 10 + x = -55.677643628 Solving 10 + x = -55.677643628 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -55.677643628 + -10 Combine like terms: 10 + -10 = 0 0 + x = -55.677643628 + -10 x = -55.677643628 + -10 Combine like terms: -55.677643628 + -10 = -65.677643628 x = -65.677643628 Simplifying x = -65.677643628

Solution

The solution to the problem is based on the solutions from the subproblems. x = {45.677643628, -65.677643628}

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