If the discriminant is positive how many solutions are there

• MrsStrong:

  Answer:

  [tex]b^2-4ac>0[/tex] yields 2 real roots

  Step-by-step explanation:

  To find the number of real roots for a quadratic, we apply the discriminate. The discriminate is the inside portion of the square root from the quadratic formula.

  • [tex]b^2-4ac>0[/tex] yields 2 real roots

  • [tex]b^2-4ac=0[/tex] yields 1 real root

  • [tx]b^2-4ac<0[/tex] yields no real roots

  Example:

  [tex]4x^2-7x+2=0[/tex] where a=4, b=-7, and c=2

  [tex]b^2-4ac=(-7)^2-4(4)(2)=49-32=17<0)[/tex].

  It has 2 real roots