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x-y=4
--------- -
0x+2y=4
2y=4
y=4/2
y=2
maka x+y=8
x+(2)=8
x=8-2
x=6
pertanyaan:x²-y²=?
x²-y²=6²-2²
=36-4
=32
maaf kalo salah
x2-y2 =
36-4 = 32
sorry ad kekeliruan
smoga dapat mmbantu (: