Question

4 - x2 - y2 - 2xy is equal to
(a) (2 - x + y)(2 + x - y)
(c) (2 + x - y)(2 + x + y)
(b)(2 + x + y)(2 - x - y)
(d) (2 - x + y)(2 - x - y)
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Answer 1

Answer:

the correct answer is option c.

I hope this answer will help you follow then please

Answer 2

Answer:

1. 4-x2-y2-2xy=0,=-(x2+y2+2xy-4) =0, =(x+y) 2-4=(x+y)2- (2) 2,= (x+y+2) (x+y-2) .