Question

using proper
identities Expand (3a-4b+5c)​

Answer 1

Answer:

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

3a^2+(-4b)^2+5c^2+2*3a*-4b+2*-4b*5c+2*5c*3a

9a^2+16b^2+25c^2-24ab-40bc+30ca is the answer

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