Question

Use a suitable identity to get each of the following products.
(i) (x+3)(x+3)
(ii) (4x+5)(4x+1)
(iii) (2y+5)(2y+5)

Answer 1

for 1.and 3. use this identity

( a+ b)^2= a^2+2ab+b^2

for 2. use (x+a) (x+ b)= x^2+ (a+b) x+ ab