1、八年级上册因式分解测试题 (满分:120 分,时间:60 分钟)题(题(题(题(题(分(分一、填空题(每空 2 分,共 24 分)1(xy0,(x2(2xy(3y2(0,(2(分解因式=,(3(分解因式:a3(a(4(题 (式分(,(因式(式(分解(分(分解(:(1),(2)(试(上(分解因式 (5(分解因式=_(6(分解因式:=(7(分解因式:=(8(分解因式:=(9(分解因式:16x2(2=(10(因式分解:2m2(11(n(x1,x2,xn,(0,1,(2(,(满(式:x1(x2(xn(0,x12(x22(xn2(12,(x13(x23(xn3(二、计算题(12、13、14 题各 3 分
2、,15 题 5 分,共 14 分)12(因式分解 13(因式分解 14(分解因式:15(因式分解(分(分三、简答题 16 题 10 分,17、18、19、20 题各 15 分,共 70 分)16(因式分解(17(因式分解时,(“(因式(”(“(式(”,(上,(,(因式分解,(,(因式分解时,(因式(,(式(,(时,(:(解(题:(1)(:(上(,(((:“分(”)(,(题(式因式分解,((2)(因式分解(,(上(因式分解((3)(上(因式分解(18(解(题:(,(间(间(:x2+px+qx+pq,(:(x+p)(x+q)(2+px+qx+pq=(x+p)(x+q)(因式分解(式:x2+(p+q
3、)x+pq=(x+p)(x+q)(1)(式(式分解因式:(2(6x+8 (2+7y-18 (2)(式“a2(2”(2(3(4(),(式(因式分解,(式(因式分解(19(x(y(3,(x(2)(y(2)(12(1)(xy(2)(x2(3xy(y2(20(式(因式分解时,(解.(,(,(式.(式(式(:(分(,(式(,(:,解(.(.(式(因式:(.(上(式(.(上(解(题.(1)(式(因式(,(2)(式(因式(,(.四、选择题(每空?分,共?分)21(因式分解 x2(9y2(()A((x+9y)(x(9y)B((x+3y)(x(3y)C((x(3y)2 D((x(9y)222(式(,(因式分解(
4、()A(a(1)(a(1)(a2(1 B(a2(6a(9(a(3)2C(x2(2x(1(x(x(2)(1 D(18x4y3(6x2y23x2y23(式(,(因式分解(:()A.B.C.D.24(,(因式分解(A(a(1)(a(2)(a2(3a(2 B(a2(3a(2(a(1)(a(2)C(a(1)2(a(1)(a2(a D(a2(3a(2(a(1)2(a(1)(一、填空题1(3(2(3ab(2a-b)a(a+b)(a-b)3(a(a(1)(a(1)4(分(分解(因式分解(分(5(a(b-1)2(解(式=a(b2-2b+1)=a(b-1)2(6(解(因式(因式,(分解因式,(7(解(因式(因式,
5、(分解因式,(8(.(分(解(.9(4(2x+y)(2()(:(因式(式(题:(题(分(:(式(4(,(式分解(解(:解:(式=4(2x+y)(2()(:4(2x+y)(2()10(2n((2)2(:(因式(式(分(:(因式 2n,(式(分解因式(解(:解:2m2(=2n(m2()=2n((2)2(:2n((2)2(11(-12 二、计算题12(解:(式=13(解:(式=14(15((x+y)(x-y)4 分三、简答题16(17((1)((2 分)((2)=(2 分)((6 分)(18(1)(x+2)(x+4)(y-2)(y+9)6 分 (2)a2+3ab+2b2=(a+b)(a+2b)a2+4ab+3b2=(a+b)(a+3b)a2+4ab+4b2=(a+2b)212 分 19(1)2(2)11(20(-1分(-2分(-3分(-5分(-6分(-7分(-8分(-10分.四、选择题21(B 22(B 23(C 24(B