4道初一因式分解①4(x-y)²+4(y-x)+1②3m(a-b)-9(b-a)²③(a²+ab+b²)²-9a²b²④(x²-5)²-8(x²-5)+163x(y-x)-6y(x-y)
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![4道初一因式分解①4(x-y)²+4(y-x)+1②3m(a-b)-9(b-a)²③(a²+ab+b²)²-9a²b²④(x²-5)²-8(x²-5)+163x(y-x)-6y(x-y)](/uploads/image/z/13893705-9-5.jpg?t=4%E9%81%93%E5%88%9D%E4%B8%80%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E2%91%A04%28x-y%29%26%23178%3B%2B4%28y-x%29%2B1%E2%91%A13m%28a-b%29-9%28b-a%29%26%23178%3B%E2%91%A2%28a%26%23178%3B%2Bab%2Bb%26%23178%3B%29%26%23178%3B-9a%26%23178%3Bb%26%23178%3B%E2%91%A3%28x%26%23178%3B-5%29%26%23178%3B-8%28x%26%23178%3B-5%29%2B163x%28y-x%29-6y%28x-y%29)
4道初一因式分解①4(x-y)²+4(y-x)+1②3m(a-b)-9(b-a)²③(a²+ab+b²)²-9a²b²④(x²-5)²-8(x²-5)+163x(y-x)-6y(x-y)
4道初一因式分解
①4(x-y)²+4(y-x)+1
②3m(a-b)-9(b-a)²
③(a²+ab+b²)²-9a²b²
④(x²-5)²-8(x²-5)+16
3x(y-x)-6y(x-y)
4道初一因式分解①4(x-y)²+4(y-x)+1②3m(a-b)-9(b-a)²③(a²+ab+b²)²-9a²b²④(x²-5)²-8(x²-5)+163x(y-x)-6y(x-y)
①4(x-y)²+4(y-x)+1
=4(x-y)²-4(x-y)+1
=[2(x-y)-1]²
=(2x-2y-1)²
②3m(a-b)-9(b-a)²
=3(a-b)(m-3a+3b)
③(a²+ab+b²)²-9a²b²
=(a²+ab+b²+3ab)(a²+ab+b²-3ab)
=(a²+4ab+b²)(a²-2ab+b²)
=(a²+4ab+b²)(a-b)²
④(x²-5)²-8(x²-5)+16
=(x²-5-4)²
=(x²-9)²
=(x-3)²(x+3)²
3x(y-x)-6y(x-y)
=3x(y-x)+6y(y-x)
=3(y-x)(x+2y)
1.[2(x-y)-1]^2
2.3(a-b)*[m-3(a-b)]
3[(a+b)^2-(ab)^2]^2-9a^2*b^2=[(a+b)^2--(ab)^2+3*a*b]*[(a+b)^2--(ab)^2-3*a*b]
4.[(x^2-5)-4]^2
第一个:[2(y-x)²-1]²
第二个:-[3(a-b)](m+b-a)
第三个:(a-b)²(a²+b²+4ab)
第四个:(x²-1)²