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telo118 [61]
3 years ago
11

If y - x = 2 and y + x = -2, then (x+y)(x - y) = (A) -4 (B) -2 (C) 0 (D) 2 (E) 4

Mathematics
2 answers:
Andreyy893 years ago
8 0

Answer:

E: 4

Step-by-step explanation:

This is a system of equations so is you line them up and subtract them, you get -2x=4. solve it and you get x=-2. Then plug it into one of the equations to get y. (y=0). since y is equal to 0, we can conclude that  -2x-2=4

Vinil7 [7]3 years ago
5 0
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