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

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


Simplifying
(8 + x)(2x + 9) = 0

Reorder the terms:
(8 + x)(9 + 2x) = 0

Multiply (8 + x) * (9 + 2x)
(8(9 + 2x) + x(9 + 2x)) = 0
((9 * 8 + 2x * 8) + x(9 + 2x)) = 0
((72 + 16x) + x(9 + 2x)) = 0
(72 + 16x + (9 * x + 2x * x)) = 0
(72 + 16x + (9x + 2x2)) = 0

Combine like terms: 16x + 9x = 25x
(72 + 25x + 2x2) = 0

Solving
72 + 25x + 2x2 = 0

Solving for variable 'x'.

Factor a trinomial.
(8 + x)(9 + 2x) = 0


Subproblem 1
Set the factor '(8 + x)' equal to zero and attempt to solve:

Simplifying
8 + x = 0

Solving
8 + x = 0

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

Add '-8' to each side of the equation.
8 + -8 + x = 0 + -8

Combine like terms: 8 + -8 = 0
0 + x = 0 + -8
x = 0 + -8

Combine like terms: 0 + -8 = -8
x = -8

Simplifying
x = -8

Subproblem 2
Set the factor '(9 + 2x)' equal to zero and attempt to solve:

Simplifying
9 + 2x = 0

Solving
9 + 2x = 0

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

Add '-9' to each side of the equation.
9 + -9 + 2x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 2x = 0 + -9
2x = 0 + -9

Combine like terms: 0 + -9 = -9
2x = -9

Divide each side by '2'.
x = -4.5

Simplifying
x = -4.5
Solution
x = {-8, -4.5}

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