Question

Evaluate x4- y if x=3 and y = 20

Answer 1

By x4 you likely meant x^4 (x to the fourth power). x4 is meaningless.

f(x,y) = x^4 - y

Replace x with 3 and replace y with 20: f(3,20) = (3)^4 - 20 = 81-20 = 61 (ans)

Answer 2

The value of the expression is 61.

Explanation:

Consider the provided expression.

`x^4-y`

In order to evaluate the expression
`x^4-y` at x = 3 and y = 20, substitute the value of x = 3 and y = 20 in the above expression.

`(3)^4-20`

`81-20`

`61`

Hence, the value of the expression is 61.