Posted by Lexie on Sunday, August 16, 2009 at 7:51pm.
Find all the values of j such that the quadratic equation
5x^2+x+4j=0
has no real solutions. Write your answer as an equality or inequality in terms of j.

Algebra 2  MathMate, Sunday, August 16, 2009 at 9:21pm
Use the quadratic formula, and make the discriminant <0.
a=5,b=1,c=4j
so b²4ac<0