2x乘2y等于多少
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/27 15:37:46
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)
2x^2*3x=6x^3
2x个
x=8/3y=15/4就是这个了...
x*y=-6;x+y=1或者-1