4X^2-2(3K-1)X+16/9为完全平方式,求K的值.
问题描述:
4X^2-2(3K-1)X+16/9为完全平方式,求K的值.
答
2 x (4/3) x 2 =16/3
2(3k-1)=16/3
k=11/9