Bài 3: Rút gọn biểu thức :
a) (2x + 1)2 +(2x + 3)2 – 2(2x + 1)(2x + 3)
b) (2x – 3)(2x + 3) – (x + 5)2 – (x – 1)(x + 2)
c) (24x2y3z2 – 12x3y2z3 + 36x2y2z2) : (-6x2y2z2)
d) (x + 2y)(x2 – 2xy + 4y2) – (x – y)(x2 + xy + y2)
e) (x3 + 4x2 – x – 4) : (x + 4)
f) x2(x + y) + y2(x + y) + 2x2y + 2xy2
g) (x + y)2 + (x – y)2 – 2(x + y)(x - y)
h) (a + b)3 - (a – b)3 – 2b3
i) (x – y)(x + y)(x2 + y2)(x4 + y4)
Loga
Sinh Học lớp 12
