solving equation by factorization

Is that suppost to be:

\(\displaystyle \H\
3a^2 + 4a - 2a^2 + 2a + 9 = 0\)

In that case:
First combine all like terms.

\(\displaystyle \H\
a^2 + 6a + 9 = 0\)

then:

\(\displaystyle \H\
(a + 3)(a + 3) = 0\)

So just solve for:

\(\displaystyle \H\
a+3=0\)

PS: Next time show the work you have done, or what you are having trouble on.
 
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