(x+5)(x+5)-4x-20=0

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Solution for (x+5)(x+5)-4x-20=0 equation: 


Simplifying
(x + 5)(x + 5) + -4x + -20 = 0

Reorder the terms:
(5 + x)(x + 5) + -4x + -20 = 0

Reorder the terms:
(5 + x)(5 + x) + -4x + -20 = 0

Multiply (5 + x) * (5 + x)
(5(5 + x) + x(5 + x)) + -4x + -20 = 0
((5 * 5 + x * 5) + x(5 + x)) + -4x + -20 = 0
((25 + 5x) + x(5 + x)) + -4x + -20 = 0
(25 + 5x + (5 * x + x * x)) + -4x + -20 = 0
(25 + 5x + (5x + x2)) + -4x + -20 = 0

Combine like terms: 5x + 5x = 10x
(25 + 10x + x2) + -4x + -20 = 0

Reorder the terms:
25 + -20 + 10x + -4x + x2 = 0

Combine like terms: 25 + -20 = 5
5 + 10x + -4x + x2 = 0

Combine like terms: 10x + -4x = 6x
5 + 6x + x2 = 0

Solving
5 + 6x + x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(5 + x)(1 + x) = 0


Subproblem 1
Set the factor '(5 + x)' equal to zero and attempt to solve:

Simplifying
5 + x = 0

Solving
5 + x = 0

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 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + x = 0 + -5
x = 0 + -5

Combine like terms: 0 + -5 = -5
x = -5

Simplifying
x = -5

Subproblem 2
Set the factor '(1 + x)' equal to zero and attempt to solve:

Simplifying
1 + x = 0

Solving
1 + x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + x = 0 + -1

Combine like terms: 1 + -1 = 0
0 + x = 0 + -1
x = 0 + -1

Combine like terms: 0 + -1 = -1
x = -1

Simplifying
x = -1
Solution
x = {-5, -1}

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