Question

evaluate using identities
1) -- (4a-b+2c)^2
2) -- (1/x +y/3 )^3​

Answer 1

arow indicates 2ca{misprinting}................

Answer 2

(4a-b+2c)^2

according to the identity (a+b+c)^2= a^2 +b^2+c^2+2ab+2bc+2ca

(4a^2)+(-b^2)+(2c^2)+2×4a×-b×2c×2c×4a

16a^2+b^2+4c^2+-8ab-4bc+16ac. ans.

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