Question

Anyone know the answer to this question???

Answer 1

They want you to write the number in index form.

The number is 5N^2, where N = 3 x 5^2 x x^3

So:

5N^2 = 5 x (3 x 5^2 x x^3)^2

         = 5 x (3^2 x 5^4 x x^6)

         = 3^2 x 5^5 x x^6

or a bit neater looking:  3² ₓ 5⁵ ₓ x⁶