2-by-4
2-by-4
8-by-2by-1/4-inch是什么意思
已知ax+by=7,ax^2+by^2=49,ax^3+by^3=133,ax^4+by^4=406,求2008(x+y
divide-by-2是什么意思
"by"
by
已知ax+by=7ax^2+by^2=49ax^3+by^3=133ax^4+by^4=406试求1995(x+y)+6
2(ax+by)(by-ax)-(ax+by)²-(ax-by)²,其中a=-4,x=-1/8 先化
如果关于x、y的方程组2ax−3by=−4ax−by=5
3 by 4 meters square.
18 by 2 kilometers是什么意思?
(ax+by)^2+(ay-bx)^2+2(ax+by)(ay-by)