Question

Evaluate using suitable identities:

(b-7)²​

Answer 1

Answer:

a2+b2-2ab

(b)2+(7)2-2×b×7

b2+49-14b

Step-by-step explanation:

I hope it is helpful for uh

Answer 2

Answer:

(b-7)^2 = (b-7)(b-7)

= b^2 - 7b - 7b + 49

= b^2 - 14b + 49

Identity which can be used here is (a-b)^2 = a^2 + b^2 - 2ab