Question

(a+2b+5c) square

find the answer using identity​

Answer 1

Step-by-step explanation:

(a+2b+5c)=

we know the identity

(a+b+c)²=a²+b²+c²+2ab+2bc+2ca

then,

(a+2b+5c)= a²+(2b)²+(5c)²+(2*a*2b)+(2*2b*5c)+(2*5c*a)

=a²+4b²+25c²+4ab+20bc+10ca