若3k(2k-5)+2k(3/2-3k)=36

问题描述:

若3k(2k-5)+2k(3/2-3k)=36
k=?

6k^2-15k+3k-6k^2=36

-12k=36
k=-3(-4x-y)(-5x+2y)=(3/4×a的n+1次方-1/2×b)×2ab=