Question

(a+b+c)2 ={a+(b+c)}? = a² + 2aqb+c)+(b + c)2
= a² + 2ab + 2ac +62 +2bc+c? = a? +62 +c+ 2(ab + bc + ca)
= sum of squares of a,b,c +2{sum of the products of a, b, c taking
of (a + bc)
(a-h+02
ICSE Mathematics for Class 9
a time)
2​

Answer 1

Answer:

(a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ca is your answer