(5a+1)( )=25a²-1
问题描述:
(5a+1)( )=25a²-1
(2x-3)( )=4x²-9
(-3a+ )(-3a- )=9a²-4b²
(x-1)(x+1)(1+x²)=
(x-1)( )=1-x²
(a+b)( )=b²-a²
(2m+1)(4m-1)=
(1-xy)(-xy-1)=
(-a-2b)²=
-4m(4m-1)和-12mn(m+n)²的公因式是
(a-b)五次方-3(a-b)³的公因式是
计算(-5/12)2007次方×(2又2/5)2006次方
若a²+a+1=2,则(a-5)(6+a)=
如果(2a+2b+1)(2a+2b-1)=63,则a+b=
x²-4x+( )=( )²
( )+2ay+1=( )²
如果x²+mx-45=(x+n)(x+5),则m= n=
因式分解x³-x= ,t²y+xy²
如果x+y=10,xy=7,则x²y+xy²=
若mx²-ny²=(x+3y)(x-3y),则m= n=
若x²+y²+2x-6y+10=0,则x的Y次方=
答
(5a+1)(5a-1 )=25a²-1(2x-3)( 2x+3 )=4x²-9(-3a+2b )(-3a-2b )=9a²-4b²(x-1)(x+1)(1+x²)=(x^2-1)(1+x²)=x^4-1(x-1)( -x-1)=1-x²(a+b)( b-a)=b²-a²(2m+1)(4m-1)=8m^2...