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
giai bat phuong trinh : x2-5x+6>=0
giai phuong trinh
6x^4-5x^3-38x^2-5x+6=0
giai phuong trinh sau:
2(6-2a)2 + (6-a)a = 0
giai phuong trinh
x2(x+2)2+4x2=12(x+2)2
Giai phuong trinh
a) (x+1)^4+(x-3)^4=0
b) x^4 + 2x^3 - 4x^2 -5x -6=0
Puong trinh chua an o mau:
Cho puong trinh 4x2 -25 +k2 +4kx=0 (an x)
a) Giai phuong trinh voi k=0
b) Giai phuong trinh voi k=-3
c) Tim cac gia tri cua k de phuong trinh nhan x=-2 lam nghiem
cho phuong trinh (an x):(m-1)x +m^2 -1=0(1) a,giai phuong trinh (1) voi m=2 b, tim gia tri cua m sao cho phuong trinh (1) nhan x=3 lam nghiem
mk dang can gap .cam on truoc a
GIAI PHUONG TRINH:
x6+3x5+6x4+x3+3x+1=0