Is this right?

Dominic

Junior Member
Joined
Jun 16, 2005
Messages
69
Factor: 3a^2 + 9a + 6.

My answer is :

3(a + 2)(a + 3)

Is this correct?
 
G

Guest

Guest
You can check it by multiplying it out.

3(a + 2)(a + 3)
= 3(a^2 + 3a + 2a + 6)
= 3(a^2 + 5a + 6)
= 3a^2 + 15a + 18

That's not 3a^2 + 9a + 6.
 
G

Guest

Guest
3a^2 + 9a + 6

try using the quadratic formula to factor that out, or complete the square.
 

Matt

Junior Member
Joined
Jul 3, 2005
Messages
183
Hi Dominic,

Dominic said:
Factor: 3a^2 + 9a + 6.

My answer is :

3(a + 2)(a + 3)

Is this correct?
Almost. That last 3 should be a 1:

. . . .
 

Dominic

Junior Member
Joined
Jun 16, 2005
Messages
69
Thanks guys.
 
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