1.(a-b)(a²-ab+b²)-ab(b-a)
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1.(a-b)(a²-ab+b²)-ab(b-a)
2.(7a-8b)(a-2b)+(a-8b)(a-2b)
3.x²-xy-2y²
4.(m-n)²-(m-n)-12
5.-2a五次方b平方+8a四次方b-8a三次方
2.(7a-8b)(a-2b)+(a-8b)(a-2b)
3.x²-xy-2y²
4.(m-n)²-(m-n)-12
5.-2a五次方b平方+8a四次方b-8a三次方
![1.(a-b)(a²-ab+b²)-ab(b-a)](/uploads/image/z/9477998-62-8.jpg?t=1.%28a-b%29%28a%26sup2%3B-ab%2Bb%26sup2%3B%29-ab%28b-a%29)
1.(a-b)(a²-ab+b²)-ab(b-a)
=(a-b)(a²-ab+b²)+ab(a-b)
=(a-b)(a²-ab+b²+ab)
=(a-b)(a²+b²)
2.(7a-8b)(a-2b)+(a-8b)(a-2b)
=(a-2b)[(7a-8b)+(a-8b)]
=(a-2b)(8a-16b)
=8(a-2b)²
3.x²-xy-2y²
=(x+y)(x-2y)
4.(m-n)²-(m-n)-12
=[(m-n)+3][(m-n)-4]
=(m-n+3)(m-n-4)
5.-2a五次方b平方+8a四次方b-8a三次方
=-2a^3(a²b²-4ab+4)
=-2a^3(ab-2)²
=(a-b)(a²-ab+b²)+ab(a-b)
=(a-b)(a²-ab+b²+ab)
=(a-b)(a²+b²)
2.(7a-8b)(a-2b)+(a-8b)(a-2b)
=(a-2b)[(7a-8b)+(a-8b)]
=(a-2b)(8a-16b)
=8(a-2b)²
3.x²-xy-2y²
=(x+y)(x-2y)
4.(m-n)²-(m-n)-12
=[(m-n)+3][(m-n)-4]
=(m-n+3)(m-n-4)
5.-2a五次方b平方+8a四次方b-8a三次方
=-2a^3(a²b²-4ab+4)
=-2a^3(ab-2)²
先化解:(a² -b² /a² -ab ) /a² +2ab+b² /
1.(a-b)(a²-ab+b²)-ab(b-a)
化简求值:(a²+ab+b²)(a²-ab+b²)(a-b)(a+b),其中a=
1.9a²+6ab+b²/3a+b
化简(a²-2ab+2b²)-(2a²-2ab-3ab²)
1.a²+b²=6,ab=1,则(a-b)²=
化简:(b²-a²)/(a²-2ab+b²)
数学因式分解计算(a²-b²)/(a²b-ab²)÷ [1+(a²+b
3a-3b/10ab*25a²b³/a²-b² x²-4y²
化简代数式:[(a²+b²)/(a²-b²)÷2ab/(a-b)(a+b)&su
3ab²+6a²b+3a³
先化简再求值:(2ab²\a+b)³÷(ab²\a²-b²)²