My Math Forum Exponent Laws

 Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion

 February 27th, 2012, 08:10 PM #1 Newbie   Joined: Feb 2012 Posts: 15 Thanks: 0 Exponent Laws ((-5k^3 x k^2)/(k))^2(((-k)^5 x k^2)/(5k^2)) heres my attempt but i cant get it , i know the answer is -5k^13. (after i simplify) (25k^ x ((-k)^5/(5)) = 5k^3 plz help
 February 27th, 2012, 09:16 PM #2 Newbie   Joined: Feb 2012 Posts: 15 Thanks: 0 Re: Expontent Laws nvm i just realized my mistake 5 minutes after i posted sorry.
 February 28th, 2012, 08:48 AM #3 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,415 Thanks: 1025 Re: Expontent Laws Please do not use "x" as multiplication sign; standard is now "*" You had this to simplify: Code:  -5 * k^3 * k^2 --------------^2 * (-k)^5 * k^2 k ------------------------------- 5 * k^2 Yout calculation of 25k^8 for this was correct: Code: -5 * k^3 * k^2 --------------^2 k As next step, do the division by 5k^2: 25k^8 / 5k^2 = 5k^6 So now you need only worry about (-k)^5 * k^2 And that simplifies to -k^7 So wrap up: 5k^6 * (-k^7) = -5k^13 That's just a suggestion as to steps to follow; in other words, do the easiest/obvious first.

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