Rút gọn biểu thức: (6x + 1)2 + (6x – 1)2 – 2(1 + 6x)(6x – 1).
Giải thích
(6x + 1)2 + (6x – 1)2 – 2(1 + 6x)(6x – 1)
= [(6x + 1) – (6x – 1)]2
= (6x + 1 – 6x + 1)2
= 22
= 4.
(6x + 1)2 + (6x – 1)2 – 2(1 + 6x)(6x – 1)
= [(6x + 1) – (6x – 1)]2
= (6x + 1 – 6x + 1)2
= 22
= 4.