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#1 2006-02-15 17:41:39

4littlepiggiesmom
Member
Registered: 2006-01-09
Posts: 42

Help with rewriting an expression with positive exponents Please help

(a^-9b^-9)(a^3b^-8)

I* get
a^3/ a^9b^17 which I simpliified to 1/a^6b^17 am I close??

1 more 1/(8xy^-6)^-1 where I get
8xy^6???

Checking my freshman sons homework and he gets something total different......help please:/

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#2 2006-02-15 17:54:30

ryos
Member
Registered: 2005-08-04
Posts: 394

Re: Help with rewriting an expression with positive exponents Please help

(a^-9*b^-9)(a^3*b^-8)
= (1/a^9)(1/b^9)(a^3)(1/b^8)
= 1/(a^6*b^17)

1/(8xy^-6)^-1
= 1 / (y^6/8x)
= 8x/y^6


El que pega primero pega dos veces.

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