How do you solve #x^2 + 9x + 18 = 0#?

1 Answer
Dec 25, 2015

#x=-3,-6#

Explanation:

#x^2+9x+18=0#

Find two numbers that when added equal #9# and when multiplied equal #18#. The numbers #3# and #9# meet the criteria.

Rewrite the expression.

#(x+3)(x+6)=0#

Solve for #x#.

#x+3=0#

#x=-3#

#x+6=0#

#x=-6#

#x=-3,-6#