9(x^2+8x+7)=0

Solution for 9(x^2+8x+7)=0 equation:

Simplifying
9(x2 + 8x + 7) = 0

Reorder the terms:
9(7 + 8x + x2) = 0
(7 * 9 + 8x * 9 + x2 * 9) = 0
(63 + 72x + 9x2) = 0

Solving
63 + 72x + 9x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '9'.
9(7 + 8x + x2) = 0

Factor a trinomial.
9((7 + x)(1 + x)) = 0

Ignore the factor 9.
Subproblem 1
Set the factor '(7 + x)' equal to zero and attempt to solve:

Simplifying
7 + x = 0

Solving
7 + x = 0

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

Add '-7' to each side of the equation.
7 + -7 + x = 0 + -7

Combine like terms: 7 + -7 = 0
0 + x = 0 + -7
x = 0 + -7

Combine like terms: 0 + -7 = -7
x = -7

Simplifying
x = -7
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 = {-7, -1}