Question

answer the following...plz...​

Answer 1

Answer:

answer 1213

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

let xy = a

let zw = b

(xy +zw) (xy-zw) = (a+b) (a-b)

= a² - b²

= (xy)²  - (zw)²

= x² y²  - z² w²