If there are two real roots of the X equation M & sup2; X & sup2; + (2m + 1) x + 1 = 0, the value range of M is obtained?
m²≠0
△=b²-4ac
=(2m+1)²-4m²
=(2m+1-2m)(2m+1+2m)
=4m+1 ≥0
m≥-1/4
When the value range of M is m ≥ - 1 / 4 and m ≠ 0
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