Question

expand the question​

Answer 1

Answer:

(a+b+c)²=a²+b²+c²+2(ab+bc+ca)

(a+2b+5c)²=(a)²

+(2b)²+(5c)²+2(a×2b+2b×5c+5c×a)

=a²+4b²+25c²+2(2ab+10bc+5ca)

=a²+4b²+25c²+4ab+20bc+10ca

Answer 2

Answer:

hey mate .....

here is your answer......

plz mark as brainliest..........