write this in trinomial form

2b^2-11-21

Question

write this in trinomial form 

2b^2-11-21

mertsj · Answer

Well -11-21 = -32 so it is NOT a trinonial

anonymous · Answer

really its in my test

mertsj · Answer

Well then, you have posted something incorrectly

anonymous · Answer

how abt in
 factored form ..

anonymous · Answer

is it 2b^2-11b-21?

mertsj · Answer

Why don't you just post it correctly?

anonymous · Answer

did you type it incorrectly?

anonymous · Answer

noo :(  it was,, write this trinomial in factored form

mertsj · Answer

You left out the b

mertsj · Answer

You have the b^2 but you left out the b.  If you want help, post it correctly.

anonymous · Answer

yeah :( sorry am nervious

mertsj · Answer

Well now we know that you are nervous and sorry.  Please post the question correctly.

anonymous · Answer

but can you help me ???

anonymous · Answer

ok

anonymous · Answer

so the problem is factor 2b^2-11b-21, am I right?

anonymous · Answer

yes

anonymous · Answer

do you know how to factor things like this?

anonymous · Answer

no I have problem understanding them

anonymous · Answer

um...
I don't quite know how to explain the way I do it... so you'll have to get someone else to help
sorry
I hope you get your answer
and merry christmas

anonymous · Answer

well thanks any ways .. and you too happy merry Christmas

directrix · Answer

@monchiiz68

Factor by grouping:

2b² -11 b -21

First, look for two numbers that multiply to (-21)*(2) AND also add to -11.

That would be 3 and -14

2b² -11 b -21 =

2b²  - 14b + 3b - 21 =

2b ( b - 7 ) + 3( b - 7) =

[Note that (b -7) is a common factor, so]

(b -7) (2b + 3)