Question

4x平方+(x+m)平方=1有两个相等的实数求m

Answer 1

1.5x^2+2mx+m^2-1=0有相等实根,

△/4=m^2-5(m^2-1)=5-4m^2=0,

m^2=5/4,

m=土√5/2.

2.△=1-4m>0,

m