=4x^2+36x+72

Solution for =4x^2+36x+72 equation:

Simplifying
0 = 4x2 + 36x + 72

Reorder the terms:
0 = 72 + 36x + 4x2

Solving
0 = 72 + 36x + 4x2

Solving for variable 'x'.

Combine like terms: 0 + -72 = -72
-72 + -36x + -4x2 = 72 + 36x + 4x2 + -72 + -36x + -4x2

Reorder the terms:
-72 + -36x + -4x2 = 72 + -72 + 36x + -36x + 4x2 + -4x2

Combine like terms: 72 + -72 = 0
-72 + -36x + -4x2 = 0 + 36x + -36x + 4x2 + -4x2
-72 + -36x + -4x2 = 36x + -36x + 4x2 + -4x2

Combine like terms: 36x + -36x = 0
-72 + -36x + -4x2 = 0 + 4x2 + -4x2
-72 + -36x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
-72 + -36x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '-4'.
-4(18 + 9x + x2) = 0

Factor a trinomial.
-4((6 + x)(3 + x)) = 0

Ignore the factor -4.
Subproblem 1
Set the factor '(6 + x)' equal to zero and attempt to solve:

Simplifying
6 + x = 0

Solving
6 + x = 0

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

Add '-6' to each side of the equation.
6 + -6 + x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + x = 0 + -6
x = 0 + -6

Combine like terms: 0 + -6 = -6
x = -6

Simplifying
x = -6
Subproblem 2
Set the factor '(3 + x)' equal to zero and attempt to solve:

Simplifying
3 + x = 0

Solving
3 + x = 0

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

Add '-3' to each side of the equation.
3 + -3 + x = 0 + -3

Combine like terms: 3 + -3 = 0
0 + x = 0 + -3
x = 0 + -3

Combine like terms: 0 + -3 = -3
x = -3

Simplifying
x = -3
Solution
x = {-6, -3}