Tuesday
May 21, 2013

# Homework Help: math

Posted by Tshepiso mphehlo on Friday, February 25, 2011 at 1:03pm.

Cn someone factorise. 3a^2-21a-24

• math - drwls, Friday, February 25, 2011 at 1:05pm

First factor out the 3.

3a^2-21a-24 = 3(a^2 -7a -8)

3(a-8)(a+1) ?

• math - Obakeng matlakaselo, Friday, February 25, 2011 at 1:09pm

3a^2-21a-24=3(a^2-7a-8)=3(a-8)(a+1).you just look at the l.c.m of the numbrs n divide that numbers by dat l.cm e.g 3,21,n 24 l.cm is 3 u jst divide ths number by dat 3 bt nt 4gtng da base wich is b

• math - Anonymous, Thursday, March 3, 2011 at 7:56am

I dnt undstnd

• math - Anonymous, Sunday, March 6, 2011 at 12:54pm

I dnt undstnd

• math - Anonymous, Thursday, March 10, 2011 at 4:24am

Come again

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