Question

(x+y)(x-y) (x²+ y²)​

Answer 1

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Answer 2

Step-by-step explanation:

the first in the form of (a+b) (a-b) = (a²-b²)

= (x²-y) ²(x²+y²)

again it is the form of (a+b) (a-b)

= (x²)^²-(y)²^²

= x⁴-y⁴