PTĐTTNT: x8 + x + 1
PTĐTTNT
x11 + x + 1
PTĐTTNT:
1) x2y2 - 1
PTĐTTNT:
a) x(x+1)2 + x(x-5) - 5(x+1)
b) 25x2 - 4y2 - 9 + 12y
PTĐTTNT (x + 2)(x+3)(x+4)(x+5) – 8
PTĐTTNT
a, x3+4x2-24x+24
b,x8+x4+1
PTĐTTNT:
xn + xn+3 -xn
1.PTĐTTNT
a, x^2-2xy-25-y^2
b, x( x-1)+y (1-x)
c, 7x+7y-(x-y)
d, x^4+y^4
2, Chứng minh rằng:
a, x^2-5x+3≥0
b, -x^2+3x-4<0 với mọi x