Question

初三的题!二次函数与一元二次方程在线等急急急

Answer 1

1.由题的：m+6>0且4(m-1)^2-4(m+6)(m+1)>=0或者m+6<0

得出：-6

2.x1+x2=2(1-m)/(m+6)

x1x2=(m+1)/(m+6)

倒数和=(x1+x2)/x1x2

=2(1-m)/(m+1)=-4

2-2m=-4m-4

2m=-6

m=-3