algebra 2
posted by kay on .
How do you find the discriminant of 3x2+2x7 and what does it tell you about the equation?

for 3x^2 + 2x  7 = 0
discr = 4 4(3)(7) = +88
so you have real roots, both irrational 
b^24ac
2^2 4(3)(7)
4 + 84 = 88 = 8*11
It tells you that there are two real roots because the discriminant is positive and that the roots will not be whole numbers because there will be a square root of 11 involved.