因式分解 -a^2+ab-a x^6-10x^3+25 4-12(x-y)+9(x-y)^2 3(a-b)^2+b(b-a) x^2n-x^4n 急回答阿!现在就要!上面乱了 -a^2+ab-a,x^6-10x^3+25,4-12(x-y)+9(x-y)^2,3(a-b)^2+b(b-a),x^2n-x^4n
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![因式分解 -a^2+ab-a x^6-10x^3+25 4-12(x-y)+9(x-y)^2 3(a-b)^2+b(b-a) x^2n-x^4n 急回答阿!现在就要!上面乱了 -a^2+ab-a,x^6-10x^3+25,4-12(x-y)+9(x-y)^2,3(a-b)^2+b(b-a),x^2n-x^4n](/uploads/image/z/7841608-16-8.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3+-a%5E2%2Bab-a+x%5E6-10x%5E3%2B25+4-12%28x-y%29%2B9%28x-y%29%5E2+3%28a-b%29%5E2%2Bb%28b-a%29+x%5E2n-x%5E4n+%E6%80%A5%E5%9B%9E%E7%AD%94%E9%98%BF%21%E7%8E%B0%E5%9C%A8%E5%B0%B1%E8%A6%81%21%E4%B8%8A%E9%9D%A2%E4%B9%B1%E4%BA%86+-a%5E2%2Bab-a%EF%BC%8Cx%5E6-10x%5E3%2B25%EF%BC%8C4-12%28x-y%29%2B9%28x-y%29%5E2%EF%BC%8C3%28a-b%29%5E2%2Bb%28b-a%29%EF%BC%8Cx%5E2n-x%5E4n)
因式分解 -a^2+ab-a x^6-10x^3+25 4-12(x-y)+9(x-y)^2 3(a-b)^2+b(b-a) x^2n-x^4n 急回答阿!现在就要!上面乱了 -a^2+ab-a,x^6-10x^3+25,4-12(x-y)+9(x-y)^2,3(a-b)^2+b(b-a),x^2n-x^4n
因式分解 -a^2+ab-a x^6-10x^3+25 4-12(x-y)+9(x-y)^2 3(a-b)^2+b(b-a) x^2n-x^4n 急回答阿!
现在就要!
上面乱了 -a^2+ab-a,x^6-10x^3+25,4-12(x-y)+9(x-y)^2,3(a-b)^2+b(b-a),x^2n-x^4n
因式分解 -a^2+ab-a x^6-10x^3+25 4-12(x-y)+9(x-y)^2 3(a-b)^2+b(b-a) x^2n-x^4n 急回答阿!现在就要!上面乱了 -a^2+ab-a,x^6-10x^3+25,4-12(x-y)+9(x-y)^2,3(a-b)^2+b(b-a),x^2n-x^4n
1.原式=b^2-a^2+ab-b^2-a
=(b+a)(b-a)-b(b-a)-a
=a(b-a)-a
=a(b-a-1)
2.原式=(x^3)^2-10x^3+25
=(x^3-5)^2
3.原式=[3(x-y)-2]^2
4.原式=3a^2-6ab+3b^2+b^2-ab
=3a^2-7ab+4b^2
=(a-b)(3a-4b)
5.原式=(x^n)^2-(x^2n)^2
=(x^n+x^2n)(x^n-x^2n)
-a^2+ab-a
=-a(a-b+1)
x^6-10x^3+25
=(x^3-5)^2
4-12(x-y)+9(x-y)^2
=[2-3(x-y)]^2
=[2-3x+3y]^2
3(a-b)^2+b(b-a)
=(b-a)[b+3(b-a)]
=(b-a)(4b-3a)
x^2n-x^4n
=x^2n(1-x^2n)
=x^2n(1+x)^n*(1-)^n
原式=a(b-a-1)
原式=(x^3)^2-2*5*(x^3)+5^2=(x^3-5)^2
原式=2^2-2*2*3*(x-y)+3^2*(x-y)^2=[2-3(x-y)]^2
原式=3(b-a)^2+b(b-a)=(b-a)(4b-3a)
原式=x^2n(1-x^2)=x^2(1+x)(1-x)n
a