the discriminant in the quadratic equation which is [tex] \frac{-b+/- \sqrt{b^{2}-4ac} }{2a} [/tex]
it is the part inside of the square root part
it is called the discriminant beause it tells you how many real or complex roots/solutions you will get
so b^2-4ac
convert to ax^2+bx+c=0 form
9x^2+2=10x
subtract 10x
9x^2-10x+2=0
ax^2+bx+c=0
a=9
b=-10
c=2
susitute
-10^2-4(9)(2)
100-36(2)
100-72
28
discriminant is 28
