3x方-mx+n=(3x+2)(x-1) m= n= (ab)三次方(a三次方+b三次方)=
问题描述:
3x方-mx+n=(3x+2)(x-1) m= n= (ab)三次方(a三次方+b三次方)=
答
3x²-mx+n=(3x+2)(x-1)
则:n=2*(-1)=-2 ,-m=(-3+2)
=>n=-2,m=1
(ab)三次方(a三次方+b三次方)= (ab)³(a+b)(a²-ab+b²)给详细点把对不起,刚才有误!3x²-mx+n=(3x+2)(x-1)=3x²-3x+2x-2=3x²-x-2=>m=-1,n=-2(ab)³(a³+b³)= (ab)³(a+b)(a²-ab+b²)