Question

hi guys I have some questions which I have difficulty with so plz help

A) (101)^2-(99)^2
B) (2y+7)^2
C) (4x+8)(4x+2)
D) (2y-7)^2
have to solve these using a suitable identity

Answer 1

Answer:

A) 400

B) 4y^2+28y+49

C) 16x^2+40+16

D) 4y^2-28y+49