A.(x;y) = (1;2)
B.(x;y) = (1;3)
C.(x;y) = (1;4)
D.(x;y) = (1;1/2)

A.minP = -2
Không tồn tại maxP
B.minP=-2
maxP=2
C.minP=-1
maxP= 0
D.minP=-1
maxP=2

A.a) 2
b) 13/18
B.a) 2/5
b) 13/18
C.a) 2
b) 5/18
D.a) 2/5
b) 5/18

A.(0;0)
B.(0;0), (2;-2)
C.(0;0), (2;2)
D.(0;0), (-2;2)

A.min y = 1/6; max y = 10/3
B.min y = -1/6; max y = 10/3
C.min y = 1/6; max y = 20/3
D.min y = -1/6; max y = 20/3

A.S = {-2}
B.S = {1}
C.S = {2}
D.S = {-1}

A.m < -2
B.
C.m = -2
D.m > -2

A.66
B.495
C.220
D.12

A.a) 18
b) 1/2
B.a) 15
b) 1/2
C.a) 18
b) 7/29
D.a) 15
b) 7/29

A.A(1;1), B(0;3), C(2;-4), D(3;-2)
B.A(1;1), B(0;3), C(2;4), D(3;-2)
C.A(1;1), B(0;3), C(2;-4), D(3;2)
D.A(1;1), B(0;3), C(2;4), D(3;2)