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boysuperstar992000
2 năm trước
a) a(1-b)+a(a²-1)=a(a²-b) c) (x-y)(x³+x²y+xy²+y³)=x⁴-y⁴ d)(x+y)(x⁴-x³y+x²y²-xy³+y⁴)=x^5+y^5 Mong đc giúp ạ
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