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

1 thought on “10.Simplify by using identities.<br />(1) (55)2 <br />(ii) (15)2​”

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

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