Question

Question #3a63b

Answer 1

Answer is b)

`3(2a)-a=15`

Explanation:

`color(blue)("Assumption")`

The question is meant to be:`" "(axx2)3-a`

Mathematically this should be written as:`" "3(2a)-a`

but `3xx2=6` giving

`6a-a`

It is bad mathematical practise to do so but you can write `a" as "1a`

`6a-1a=5a`

But `a` has the value of 3 so we have

`color(brown)(5a)color(blue)(" "->" "5xx3=15)`

So the answer is the solution b