Question

factorise a²+b²+2(ab+bc+ca)​

Answer 1

Step-by-step explanation:

dear friend

a2+b²+c²+2(ab+bc+ca)

is (a+b+c)²

Answer 2

Step-by-step explanation:

a^2 + b^2 + c^2 + 2ab + 2bc + 2ca - c^2.

(By adding and subtracting c^2).

= (a + b + c )^2 - c^2.

{Using (a + b + c )^2 = a^2 + b^2 + c^2 + 2ab + 2bc + 2ca - c^2.}

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

{Using a^2 - b^2 = (a+b)(a-b)

=(a + b + 2c)(a+b)