phân tích đa thức thành nhân tử
a)
b)
c)
p/s: tách hoặc thêm bớt hạng tủ để phân tích
Bài sao dễ thế –  nguyenconghoanganh02 20-08-17 08:09 PM

Cần trả +5,000vỏ sò để xem nội dung lời giải này

ai bầu chọn đi –  nguyenconghoanganh02 22-08-17 07:55 PM

Cần trả +2,000vỏ sò để xem nội dung lời giải này

ai bầu chọn đi –  nguyenconghoanganh02 22-08-17 07:55 PM
a) = ($2x^3$+$x^2$) - $(2x^2+x)$ + $(6x+3)$
    = $x^2$$(2x+1)$ - x$(2x+1)$ + 3$(2x+1)$
    = $(x^2-x+3)$$(2x+1)$
ai bầu chọn đi –  nguyenconghoanganh02 22-08-17 07:55 PM
khác j tk bên trên làm –  ๖ۣۜTQT☾♋☽ 21-08-17 06:15 AM
c,$x^8+3x^4+4=x^8+4x^4+4-x^4=(x^4+2)^2-x^4=(x^4+2-x^2)(x^4+2+x^2)$
a,$2x^3-x^2+5x+3=2x^3+x^2-2x^2-x+6x+3=x^2(2x+1)-x(2x+1)+3(2x+1)=(2x+1)(x^2-x+3)$
b,$27x^3-27x^2+18x-4=27x^3-9x^2-18x^2+6x+12x-4=9x^2(3x-1)-6x(3x-1)+4(3x-1)=(3x-1)(9x^2-6x+4)$

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