Question

(a+b+c)²=a²+b²+c²+2(.....................)​

Answer 1

Answer:

hi there !

(a+b+c)²=a²+b²+c²+2ab+2bc+2ca

Hope it helps you !!

Answer 2

$\bigstar$ Question

Fill in the Blank:

( a + b + c )² = a² + b² + c² + 2(______)

$\bigstar$ Given:

• ( a + b + c )² = a² + b² + c² + 2(______)

$\bigstar$To find:

• Fill in the Blank.

$\bigstar$ Solution:

( a + b + c )²

= ( a + b + c )( a + b + c )

= a² + ab + ac + ba + b² + bc + ac + cb + c²

= a² + b² + c² + ab + ab + ac + ac + bc + bc

= a² + b² + c² + 2ab + 2bc + 2ca

= a² + b² + c² + 2 ( ab + bc + ca)

$\bigstar$ Answer:

$\therefore$( a + b + c )² = a² + b² + c² + 2 ( ab + bc + ca) and so, the answer in the Blank will be (ab + bc + ca).