搜索
1. $2c^{2} - 8$.
2. $a^{3}b - ab$.
3. $3ax^{2} - 3ay^{2}$.
4. $9k^{2} + 6km + m^{2}$.
5. $(x - 1)^{2} - 9$.
6. $x^{3} + 2x^{2}y + xy^{2}$.
7. $3b(a - b) + a(a - b)$.
8. $n^{2}(m - 2) - n(2 - m)$.
9. $81a^{4} + 16b^{4} - 72a^{2}b^{2}$.
10. $2(m + n)^{2} - 6n(m + n)$.
11. 先因式分解，再求值：$2(a - 3)^{2} + a(3 - a)$，其中$a = 2$.
2. $a^{3}b - ab$.
3. $3ax^{2} - 3ay^{2}$.
4. $9k^{2} + 6km + m^{2}$.
5. $(x - 1)^{2} - 9$.
6. $x^{3} + 2x^{2}y + xy^{2}$.
7. $3b(a - b) + a(a - b)$.
8. $n^{2}(m - 2) - n(2 - m)$.
9. $81a^{4} + 16b^{4} - 72a^{2}b^{2}$.
10. $2(m + n)^{2} - 6n(m + n)$.
11. 先因式分解，再求值：$2(a - 3)^{2} + a(3 - a)$，其中$a = 2$.
答案：
1.2(c + 2)(c - 2). 2.ab(a + 1)(a - 1).
$3.3a(x + y)(x - y). 4.(3k + m)^{2}.$
$5.(x + 2)(x - 4). 6.x(x + y)^{2}.$
7.(a - b)(3b + a). 8.n(m - 2)(n + 1).
$9.(3a + 2b)^{2}(3a - 2b)^{2}. 10.2(m + n)(m - 2n).$
11.解：原式=(a - 3)(a - 6).当a = 2时，原式=4.
$3.3a(x + y)(x - y). 4.(3k + m)^{2}.$
$5.(x + 2)(x - 4). 6.x(x + y)^{2}.$
7.(a - b)(3b + a). 8.n(m - 2)(n + 1).
$9.(3a + 2b)^{2}(3a - 2b)^{2}. 10.2(m + n)(m - 2n).$
11.解：原式=(a - 3)(a - 6).当a = 2时，原式=4.
查看更多完整答案，请扫码查看
