Question

The expansion of (x + y + 3)² =

Answer 1

Answer:

Use the Binomial Theorem.

x3+3x2y+3xy2+y3

plz follow if this helps

Answer 2

Question:

(x + y + 3)²

Answer:

Using identity:

(a + b + c)² = a²+b²+c²+2ab+ 2bc+2ca

(x + y + 3)²

= x²+y²+(3)²+2(x)(y)+2(y)(3)+2(3)(x)

= x²+y²+9+2xy+6y+6x

Final Answer:

(x + y + 3)²= x²+y²+9+2xy+6y+6x