How do you simplify #(sqrt49(a^2)(b^-8))#?
1 Answer
Oct 12, 2015
Explanation:
Your starting expression looks like this
#sqrt(49) * a^2 * b^(-8)#
The first thing to notice here is that
#49 = 7 * 7 = 7^2#
#sqrt(49) = sqrt(7^2) = 7#
The expression becomes
#7 * a^2 * b^(-8)#
Next, rewrite the negative exponent by using
#x^(-n) = 1/x^n" "# , for#x!=0#
In your case, you have
#b^(-8) = 1/b^8#
The expression will thus be
#sqrt(49) * a^2 * b^(-8) = color(green)(7 * a^2 * 1/b^8)#