Question #3a63b

Question

1818 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-06-18T10:29:51

Answer is b)

#3(2a)-a=15#

#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