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ilovehotran
2 năm trước
1.Viết dưới dạng tổng 2 lập phương hoặc hiệu 2 lập phương: a,( x-4 )( x^2+4x+16 ) b, ( x+4 )( x^2-4x-16 ) c, ( 3x-1 )( 9x^2+3x+1 ) d,( 2x-5 )( 4x^2+10x+25 ) e, ( 3x-5y )( 9x^2 +15xy+25y^2 ) g, ( 4x-1 )( 16x^2+4x+1)
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