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) (24x 2 y 3 z 2 – 12x 3 y 2 z 3 + 36x 2 y 2 z 2 ) : (-6x 2 y 2 z 2 )
d) (x + 2y)(x 2 – 2xy + 4y 2 ) – (x – y)(x 2 + xy + y 2 )
e) (x 3 + 4x 2 – x – 4) : (x + 4)
f) x 2 (x + y) + y 2 (x + y) + 2x 2 y + 2xy 2
g) (x + y) 2 + (x – y) 2 – 2(x + y)(x - y)
h) (a + b) 3 - (a – b) 3 – 2b 3
i) (x – y)(x + y)(x 2 + y 2 )(x 4 + y 4 )
Loga
Sinh Học lớp 12
