Hi, all!

I have exams coming up soon and I'm just going through my textbook and practising a few past exam papers and I have this which I need help on. :)

a) 2(-3a^{2}b)^{2}

b) 2b^{n }x 2^{3}bThanks in advance!!!!!

(Smile)

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- Jun 6th 2012, 07:44 AMJesseElFantasmaGrade 9 Algebra help
Hi, all!

I have exams coming up soon and I'm just going through my textbook and practising a few past exam papers and I have this which I need help on. :)

a) 2(-3a^{2}b)^{2}

b) 2b^{n }x 2^{3}bThanks in advance!!!!!

(Smile) - Jun 6th 2012, 08:00 AMReckonerRe: Grade 9 Algebra help
It would be helpful to know what you want to do with these expressions. Are you being asked to simplify them? If so, apply the following properties of exponents:

$\displaystyle a^ma^n = a^{m+n}$

$\displaystyle \frac{a^m}{a^n} = a^{m-n}$

$\displaystyle (ab)^n = a^nb^n$

$\displaystyle \left(\frac ab\right)^n = \frac{a^n}{b^n}$ - Jun 6th 2012, 08:10 AMSarasijRe: Grade 9 Algebra help
a) 2(-3a

^{2}b)^{2}=2 x (-3)^{2}x (a^{2})^{2}x (b)^{2}= 2 x 9 x a^{4}x b^{2}= 18a^{4}b^{2}

b)2b^{n}x 2^{3}b = 2 x 2^{3}x b^{n}x b = 2^{4}x b^{n+1}= 16b^{n+1 anyways I would always say to practice these sorts of exercises with the formulas that Reckoner gave here.} - Jun 6th 2012, 08:14 AMWilmerRe: Grade 9 Algebra help
- Jul 27th 2012, 12:39 PMdavidthompson873Re: Grade 9 Algebra help
It is letter A. Is this really a grade 9 equation?

Find Reno Wedding Photographers For A Perfect Wedding - Jul 27th 2012, 03:01 PMWilmerRe: Grade 9 Algebra help
Hey buddy, this is a math help site, not an advertizing spot !