Question

What is the value of the expression x^-2y^3 where x=-5 and y=2?

Answer 1

8/25

Explanation:

The given expression x^-2 y^3, where x = -5 and y = 2

Here we have negative exponent, we have to make it positive using exponent rule.

a^-1 = 1/a

Using this rule, we can rewrite the given expression as

=
`(1)/(x^2) * y^3`

Now plug in x = -5 and y = 2, in the above expression, we get

= 1/(-5)^2 *(2)^3

= 1/25 *8

= 8/25

That's the answer.

Hope you will understand the concept.

Thank you.