Bµi 1: Thực hiện phép tính :
a)2xy(x 2 + xy - 3y 2 )
b) (x + 2)(3x 2 - 4x)
c) (x 3 + 3x 2 - 8x - 20) : (x + 2)
d) (4x 2 – 4x – 4) : (x + 4)
e) (2x 3 – 3x 2 + x – 2) : (x + 5)
f) (x + y) 2 + (x – y) 2 – 2(x + y)(x - y)
g) (a + b) 3 - (a – b) 3 – 2b 3
h) (x – y)(x + y)(x 2 + y 2 )(x 4 + y 4 )
i) 2x 2 (x – 2)+ 3x(x 2 – x – 2) –5(3 – x 2 )
k) (x – 1)(x – 3) – (4 – x)(2x + 1) – 3x 2 + 2x – 5
l) (x 4 – x 3 – 3x 2 + x + 2) : (x 2 – 1)
Loga
Sinh Học lớp 12
