Question

(b-7) (b-7) solve in squares by using identies

Answer 1

(b-7)(b-7)
it means (b-7)square
which is
b×b+7×7-2×b×7
when solved I get
b×b-14b +49 as ur ans

Answer 2

(b-7) are two times then do it (b-7) sq. and then solve it as in given figure I have done