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familynguyenyennhi12122005
2 năm trước
Phương pháp nhân tử chung: 1) (x^2 - 16)(7-x)=0 2) 7-x /2 + 2/3(x-7)(x-3)=0 3) 4x^2 + (x-1)^2 - (2x+1)^2=0 4) x^3 + 1=(x+1)(2-x)=0 5) x^4 + x^2 - 2=0 6) x^4 - 8x^3 - 9x^2=0 7) (4x-5)^2 + 7(4x-5) -8=0 8) (x+3)^2(x^2 + 6x + 1)= 9 9) 2x(8x-1)(8x^2 - x + 2) -126=0 Giúp mik với, mik làm gần hết rồi, còn lại mấy bài này~~
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