x^2+_______-2y^2=(x-y)(________) a^2+(n/m)a+(_____)=(____+__
x^2+_______-2y^2=(x-y)(________) a^2+(n/m)a+(_____)=(____+__
因式分解:(m-n)²+2(n-m)=_______ 因式分解:x²-y²+6y-9=__
int x=2,y; y=(x++)*5;运行后x=_____ __ y=____ ___.
通过配方,把二次函数y=-x²+2x+3化成y=a(x+m)+k的形式为________,图象开口向_____
若[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m,
计算一,y-x分之x+y 加x-y分之y剪y-x分之2x-y= 二n-m分之m+2n加n-m分之n剪n-m分之2n=__
(2x^2m+3)+(3y^3m-7)=0,是关于x、y的二元一次方程,m是_____,n是_______
已知集合m={(x,y)/x平方+2x+y=0},n={(x,y)/y=x+a},且空集是m交n
用列举法表示集合A={(x,y)丨2x+y-5=0,x∈N,y∈N}为_______?怎样做,
已知函数y=x^2-2x-3,把它写成y=a(x+m)^2+k的形式为________;由抛物线____经过____平移
把下列各式因式分解(2m+3n)(2m-n)-4n(2m-n)(x+y)^2(x-y)+(x+y)(y-x)^24a(x
已知集合A={(x,y)|x-y+m=0},B={(x,y)|y=√9-x^2}.M交N元素个数