Bài 1: Thực hiện phép tính :
a)2xy(x2+ xy - 3y2)
b) (x + 2)(3x2 - 4x)
c) (x3 + 3x2 - 8x - 20) : (x + 2)
d) (4x2 – 4x – 4) : (x + 4)
e) (2x3 – 3x2 + x – 2) : (x + 5)
f) (x + y)2 + (x – y)2 – 2(x + y)(x - y)
g) (a + b)3 - (a – b)3 – 2b3
h) (x – y)(x + y)(x2 + y2)(x4 + y4)
i) 2x2(x – 2)+ 3x(x2 – x – 2) –5(3 – x2)
k) (x – 1)(x – 3) – (4 – x)(2x + 1) – 3x2 + 2x – 5
l) (x4 – x3 – 3x2 + x + 2) : (x2 – 1)
Loga
Sinh Học lớp 12
