Question 1144405
<br>
A quadratic equation ax^2+bx+c=0 has real solutions if b^2-4ac is non-negative.<br>
For your example,<br>
{{{7^2-4(3)h >= 0}}}
{{{49-12h >= 0}}}
{{{49 >= 12h}}}
{{{h <= 49/12}}}