Toán Lớp 8: PTĐTTNT
16) x^2yz + 5xyz − 14yz
17) (x − y)^2+ 4(x − y) − 12
18) ( x − 1 )( x − 2 )( x + 7 )( x + 8 ) + 8
19) x^6 + y^6
20) x^5 + x^4+ 1
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Toán Lớp 8: PTĐTTNT
16) x^2yz + 5xyz − 14yz
17) (x − y)^2+ 4(x − y) − 12
18) ( x − 1 )( x − 2 )( x + 7 )( x + 8 ) + 8
19) x^6 + y^6
20) x^5 + x^4+ 1
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