已知X^2+KM+10=(X+M)*(X+5)则K=,M
问题描述：
已知X^2+KM+10=(X+M)*(X+5)则K=,M
KUAI!!!!!!!!!!!!!!
答
(X+M)(X+5)
=X(X+5)+M(X+5)
=X²+5X+MX+5M
=X²+(M+5)X+5M
=X²+KX+10
所以M+5=K
5M=10
M=2
K=M+5=7