The exponent is 6, since 7^6 is the same as (see picture).
Is there an image i don’t understand what expressions you’re asking for?
Answer:
Prefer the attachment for ur ans.
The formula for finding the area of a square is:

The formula for finding the area of a triangle is:

So for the square the area would be:

The area for the triangle would be:
According to the identity if a+b+c=0
then a3+b3+c3=3abc
a3+b3+c3/abc=3
a2*a/bc*a+b2*b/ca*b+c2*c/ab*c=3
cancel a,b,c in all the fraction then you get
<span>a²/bc+b²/ca+c²/ab=3.
</span>hence proved