Các câu hỏi tương tự
giai phuong trinh x^4-7x^3+14x^2-7x+1=0
Giai phuong trinh :
2x^4-7x^3+9x^2-7x+2=0
Giai phuong trinh:
\(x^3-7x^2+15x-25=0\)
Giai phuong trinh
\(\frac{7x}{x-1}-\frac{5x}{x+1}+\frac{x+21}{x^2-1}=0\)
giai phuong trinh:6x3-7x2+16x-52=0
giai phuong trinh : \(\frac{4x}{x^2-5x+6}+\frac{3x}{x^2-7x+6}=6\)
Ai gioi dau giup voi
Cho phuong trinh
2x^4-7x^3+9x^2-7x+2=0
1.tong tat ca cac nghiem cua phuong trinh : 3x4+5x3-x2-5x-2=0 la
2. tich tat ca cac nghiem cua phuong trinh 2x4+7x3-2x2-13x+6=0
x^4-7x^3+14x^2-7x+1
(x+1)^4+(x^2+x+x)^2