Toán Lớp 8: 1, Rút gọn:
x(x-y)-y(x+y)
CTLHN LUÔN @@!!!
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Toán Lớp 8: 1, Rút gọn:
x(x-y)-y(x+y)
CTLHN LUÔN @@!!!
Comments ( 2 )
=x^2-xy-xy-y^2
=x^2-2xy-y^2