How to figure out the algebraic equation 2a squared + 18a

[From: ] [author: ] [Date: 13-05-20] [Hit: ]

I can't figure out how.
Please explain your steps :)
Thank you!

2a^2 + 18a
= 2a(a + 9)

2a*2+18a=2a(a+9)
2a(a+9)=0
a+9=0
a=-9

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