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nguyenngocngancabien
2 năm trước
1 P(x)=5$x^{3}$+2$x^{4}$-$x^{2}$+$3x^{2}$-$x^{3}$-$2x^{4}$+1-$4x^{3}$ a)Thu gọn và sắp xếp các hạng tử của đa thức theo lũy thừa giảm của biến b)Tính P(1) và P(-1) c)Chứng minh đa thức trên không có nghiệm
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