Question

Find the square by using the identities. (b-7)2​

Answer 1

$(b - 7)2 \\ = 2b - 14$

Answer 2

Solution:

(b - 7)^2

Using the polynomial identity

(x - y)^2 = x^2 - 2xy + y^2

x = b

y = 7

Therefore,

(b - 7)^2 = b^2 - 14b + 49

Hope this will be helpful to you.