Question

If the radius of a circle is `3x^4y^2`, what is its area?

Answer 1

Area of a circle is `9pix^8y^4`.

Explanation:

If the radius of a circle is `r`, area of circle is given by `pixxrxxr`

Hence, area of a circle whose radius is `3x^4y^2` is

`pixx3x^4y^2xx3x^4y^2=pixx3^2x^(4+4)y^(2+2)`

= `pixx9xx x^8xxy^4`

= `9pix^8y^4`