give me answer but explain
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer:
Step-by-step explanation:
(a+b)3+(b+c)3+(c+a)3-3(a+b)(b+c)(c+a)=put x=a+b,y=b+c,z=c+a
x3+y3+z3-3xyz is the formula in 9th st.
=a3+b3+b3+c3+c3+a3-3abc-3abc
=2(a3+b3+c3-3abc)
hence proved
pls mark me as brainliest.......................