解:(1)原式=1+
-
+2009=2010;
(2)原式=(-2ab)•3a
2-(-2ab)•2ab-(-2ab)•b
2=-6a
3b+4a
2b
2+2ab
3;
(3)原式=8x
6-6x
6-12x
5+6x
4=2x
6-12x
5+6x
4;
(4)原式=4a
2+12ab+9b
2-4a
2+b
2=12ab+10b
2;
(5)原式=4x
2-25-(4x
2-6x+2x-3)
=4x
2-25-4x
2+6x-2x+3
=4x-22;
(6)原式=(
+3-
+3)(
+3+
-3)
=6×
=4x;
(7)原式=x
2+4x+3-x
2+4x-4
=8x-1;
(8)原式=(a+b)
2-9
=a
2+2ab+b
2-9;
(9)原式=(9x
2y)÷( 3xy)-6xy
2÷( 3xy)+3xy÷( 3xy)
=3x-2y+1;
(10)原式=9a
2-6a+1-6+15a-9a
2=9a-5,
當(dāng)a=-
時(shí),原式=-3-5=-8.
分析:(1)首先計(jì)算乘方,然后計(jì)算加減即可;
(2)根據(jù)單項(xiàng)式乘以多項(xiàng)式法則,用-2ab分別乘以括號(hào)里的每一項(xiàng)進(jìn)行計(jì)算即可;
(3)首先計(jì)算乘方,再利用單項(xiàng)式乘以多項(xiàng)式法則計(jì)算乘法,最后合并同類項(xiàng)即可;
(4)先根據(jù)完全平方公式計(jì)算(2a+3b)
2,再根據(jù)平方差公式計(jì)算乘法(2a-b)(2a+b),最后計(jì)算加法即可;
(5)首先根據(jù)平方差公式、多項(xiàng)式乘以多項(xiàng)式法則計(jì)算乘法,再計(jì)算加減法即可;
(6)逆用平方差公式進(jìn)行計(jì)算即可;
(7)先根據(jù)完全平方公式計(jì)算-(x-2)
2,后計(jì)算乘法,最后計(jì)算加法即可;
(8)把a(bǔ)+b看做一個(gè)整體,首先利用平方差公式計(jì)算,再利用完全平方公式計(jì)算(a+b)
2即可.
(9)根據(jù)多項(xiàng)式除以單項(xiàng)式法則計(jì)算即可;
(10)首先對(duì)原式進(jìn)行乘方運(yùn)算,去括號(hào),合并同類項(xiàng),然后代入數(shù)值計(jì)算即可.
點(diǎn)評(píng):此題主要考查了整式的混合運(yùn)算,關(guān)鍵是熟練掌握乘法公式,多項(xiàng)式的乘法及多項(xiàng)式除法等計(jì)算法則.