八年级数学上册乘法公式100
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4 4
(—x+y)(—x-y) (xy+4)(xy-4) 5 5
(4a-2b)(2b+4a) (-b-9)(b+9) 73×69 104×99
(4a+8)2(4x+2y)2(2m-9n)2
103279982(-3p-4)2
(x-10)2-(3x+3)2(2x+y+8)(2x+y-8)2 (x-y+1)2[(x+5)(x-5)]2
先化简,再求值。(x+6)2+(x-4y)(4x+y),其中x=2,y=11
1 1
(—x+y)(—x-y) (xy+7)(xy-7) 8 8
(a-b)(b+a) (-b-2)(b+2)
71×69 304×299
(3a-6b)2(x-9)2(4m-9)2
9022182(-3p-2q)2
(x+10)2+(x-2)2(x+y+4)(x+y-4)2
(3x+y-5)2[(3x+10)(3x-10)]2
先化简,再求值。(x+6)2+(x-y)(x+y),其中x=2,y=11
4 4
(—x+y)(—x-y) (3xy+7)(3xy-7) 3 3
(5a-5b)(5b+5a) (-b-9)(b+9) 52×49 904×899
(2a+3)2(x-8)2(4m+4)2
4012772(-p-7)2
(2x-5)2+(x+4)2(x-y+7)(x-y-7)2
(2x-3y-5)2[(3x+2)(3x-2)]2
先化简,再求值。(x-2)2+(x-6y)(6x+y),其中x=-8,y=-9
1 1
(—x+y)(—x-y) (xy+2)(xy-2) 4 4
(6a-4b)(4b+6a) (-b-1)(b+1) 94×89 403×399
(a-9)2(x+5y)2(-3m+3)2
30223972(-2p+9q)2
(3x+9)2+(x-10)2(x+5y+10)(x+5y-10)2 (x+y+1)2[(3x+6)(3x-6)]2
先化简,再求值。(2x+5y)2+(x-2y)(2x+y),其中x=-8,y=-7
8 8
(—x+y)(—x-y) (3xy+4)(3xy-4) 7 7
(3a-3b)(3b+3a) (-b-5)(b+5) 92×89 604×599
(a-7)2(x+8)2(m+6)2
4001239972(-p+2q)2
(x+2)2-(4x+8)2(x+y+6)(x+y-6)2
(3x-2y-2)2[(2x+1)(2x-1)]2
先化简,再求值。(3x+2y)2-(2x-3y)(3x+2y),其中x=6,y=-9
6 6
(—x+y)(—x-y) (xy+3)(xy-3) 5 5
(a-6b)(6b+a) (-6b-4)(6b+4) 31×29 201×199
(2a-9)2(x+6)2(m+8)2
7328982(-p-5)2
(3x-2)2+(3x+6)2(x-y+5)(x-y-5)2 (4x-y-1)2[(2x+3)(2x-3)]2
先化简,再求值。(x+4)2-(x-y)(x+y),其中x=-10,y=7
4 4
(—x+y)(—x-y) (4xy+6)(4xy-6) 3 3
(2a-4b)(4b+2a) (-6b-4)(6b+4) 73×69 301×299
(3a-3b)2(2x-2)2(m-4n)2
2012872(2p+3)2
(2x+1)2-(x-7)2(x+7y+9)(x+7y-9)2
(x+3y+1)2[(3x+9)(3x-9)]2
先化简,再求值。(3x+8y)2-(5x-6y)(6x+5y),其中x=-6,y=-1
1 1
(—x+y)(—x-y) (5xy+2)(5xy-2) 3 3
(2a-b)(b+2a) (-5b-5)(5b+5) 51×49 403×399
(a+5b)2(x+2)2(3m+7)2
23299982(-3p-9)2
(x-3)2-(2x-8)2(2x+y+4)(2x+y-4)2 (x+y-1)2[(x+2)(x-2)]2
先化简,再求值。(x+5y)2-(x-y)(x+y),其中x=4,y=9
3 3
(—x+y)(—x-y) (2xy+8)(2xy-8) 4 4
(3a-3b)(3b+3a) (-4b-9)(4b+9) 31×29 701×699
(a-9)2(2x-8)2(-m+3n)2
102279992(-3p+8q)2
(3x-6)2-(x+2)2(x-6y+2)(x-6y-2)2 (x+3y+3)2[(3x+9)(3x-9)]2
先化简,再求值。(x-6y)2-(x-y)(x+y),其中x=-2,y=3
6 6
(—x+y)(—x-y) (xy+1)(xy-1) 7 7
(5a-b)(b+5a) (-b-6)(b+6) 84×79 801×799
(a-5)2(2x-4y)2(m-5n)2
20325992(-p+8)2
(x+4)2-(x+7)2(x-y+5)(x-y-5)2
(4x-4y-5)2[(2x+7)(2x-7)]2
先化简,再求值。(2x+7y)2+(x-2y)(2x+y),其中x=-6,y=3