(a-2)(a^2+2a+4)=a^3-8,(2x-y)(4x^2+2xy+y^2)=8x^3-y^3
2个回答
(a-b)(a²+ab+b²)
=a(a²+ab+b²)-b(a²+ab+b²)
=a²+a²b+ab²-a²b-ab²-b³
=a³-b³
所以
(a-b)(a²+ab+b²)=a³-b³
相关问题
2a^2(3a^2-2a+1)+4a^3 (-2x^2y+6x^3y^4-8xy)÷(-2xy) (2x+y)^2-(2
分解因式(a^2+5a+3)(a^2+5a-2)-6 x^2+4xy+4y^2+4x+8y+3 (x+3)(x^2-1)
A=2x^2-3xy+y^2+x-3y,B=4x^2-6xy+2y^2+4x-y,若|x-3a|+(y+3)^2=0,且
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A
设A=2x2-3xy+y2+x-3y,B=4x2-6xy+2y2+4x-y,若|x-3a|+(y+3)2=0,且B-2A
A=4x2-2xy+4y2,B=3x2-6xy+3y2,且|x|=3,y2=16,|x+y|=1,求4A+[(2A-B)
已知A=2x2-4xy+6y2+3x-y,B=x2-2xy+3y2-2x+y,如果A-2B=3a,并且|x-a|+(y+
因式分解:3x2+5xy-2y2+x+9y-4 x2+x-(a2-a) 3x2+4xy-y2 x,y,a后面的2表示平方