Question

if A=x²+4, and B = y²-4, find : ( A+B )²​

Answer 1

Answer:

x⁴+2x²+2y²+y²

Step-by-step explanation:

(x²+4+y²-4)²

(x²+y²+4-4)²

(x²+y²)²

(x²+y²)(x²+y²) ----> do the foil method

x⁴+2x²+2y²+y⁴