Question

10.Simplify by using identities.
(1) (55)2
(ii) (15)2​

Answer 1

Answer:

1)3025

2)225

Step-by-step explanation:

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

(55)^2=(50+5)^2=50^2+2×50×5+5^2

=3025.

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

(15)^2=(10+5)^2=10^2+2×10×5+5^2

=225