2x乘2y等于多少-搜答案-智慧作业帮

X等于18的哈

因为X=1/√5-2y=1/√5+2所以x=√5+2,y=√5-2xy=5-4=1再问：X+y=？过程。再答：x+y=√5+2+√5-2=2√5再问：x/y-y/x=？过程。再答：x-y==√5+2-

原式=(-x)²*x*（-2y）³+（2xy）²*（-x）²*y（?）=-x*x*8y³+4x²y²*x²*y=-8x&

2x乘3x=6x²

x乘(x+1)乘(x+2)乘(x+3)等于360x(x+1)(x+2)(x+3)=360x(x+3)(x+1)(x+2)=360(x²+3x)(x²+3x+2)=360令y=x&s

（x+y）^2乘（x-y）^2=[（x+y）乘（x-y）]^2=(x^2-y^2)^2=2^2=4

直接将二式相乘,得(x²+ax+b)(3x+1)=3x³+x²+3ax²+ax+3bx+b=3x³+(1+3a)x²+(a+3b)x+b由于

XY互为相反数,x+y=0x-y=2x(x+y+3)(x-y-2)=3(2x-2)=62x-2=2x=2

x=1y=-2/1再问：谢谢，我还想问一个再答：问吧再问：a的平方b减3ab加2ba的平凡方减b的平方a再答：收藏我可以吗，谢谢

8^x*32^y=(2^3)^x*(2^5)^y=2^(3x+5y)=2^2=4

x^2-2xy+y^2+y^2-y+1/4=0(x-y)^2+(y-1/2)^2=0(x-y)^2>=0(y-1/2)^2>=0(x-y)^2+(y-1/2)^2>=0(x-y)=0(y-1/2)=0

x^2+2x+y^2-6y+10=x^2+2x+1+y^2-6y+9=(x+1)^2+(y-3)^2

原式＝xy(x-y)=1×4=4

2x乘（-x)4次方-(-x)乘x的4次方=2x(-x)^4-(-x)x^4=2x^5+x^5=3x^5X乘X的M-1次方+X的平方乘X的M-2次方-3乘X的3次方乘X的M-3次方=x*x^(m-1)

y的6次方

2x^2*3x=6x^3

x乘2x等于多少x

2x个

结果为500

x=8/3y=15/4就是这个了...

x*y=-6；x+y=1或者-1