Question

Evaluate using identities: 66 × 68

Answer 1

4488 k answer is correct

Answer 2

we can use the identity

(x+a) (x+b) = xsquare + (a+b)x + ab.

(60+6) (60+8)= 60square + (6+8)60 + (6×8)

= 3600 + (14)60 + 48

= 3600 + 840 + 48

= 4488

Hence, 66×68 = 4488