Question

a#b= a2(7-b), what is the value of (2#5)#3

Answer 1

a#b = 2a(7-b)

(2#5)#3

Let us look at the parentheses first.

2#5 = 2*2(7-5)
= 4(2)
= 8

Now the equation becomes 8#3

8#3 = 2*8(7-3)
=16(4)
= 64

The value is 64. Hope this helps!

Answer 2

If I read this correctly it says

If a#b=a^2(7-b) what is (2#5)#3
2#5 = 2^2(7-5) = 8
8#3 = 8^2(7-3) = 256