`(-b) xx(-b) xx(-b) = -b^3`

Simplify: (a xx b) xx (a^(-1) + b^(-1) ) (a) a - b (b) a (c) a + b (d) b

If(3a-b)xx(a+3b)=ka xx b bualueofk?

(3a^(2)b)xx(4a^(2)b)xx(-2)

If (a)/(b) is a rational number and n is a natural number then ((a)/(b))^(n)=(a)/(b)xx(a)/(b)xx(a)/(b)xx(a)/(b)xx....xx(a)/(b)=(a xx a xx a xx a xx...xx a)/(b xx b xx b xx b xx......xx b)=(a^(n))/(b^(n))