Toán Lớp 8: Biểu thức (x-y)^2 bằng :
a, x^2 + y^2
b, (y-x)^2
c, y^2 – x^2
d, x^2 – y^2
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Toán Lớp 8: Biểu thức (x-y)^2 bằng :
a, x^2 + y^2
b, (y-x)^2
c, y^2 – x^2
d, x^2 – y^2
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