SOLUTION: Larissa always uses the full quadratic formula to determine the # of zeroes that a quadratic function has. What could we tell her that would help her understand that she only needs

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Larissa always uses the full quadratic formula to determine the # of zeroes that a quadratic function has. What could we tell her that would help her understand that she only needs      Log On


   

Question 1197264: Larissa always uses the full quadratic formula to determine the # of zeroes that a quadratic function has. What could we tell her that would help her understand that she only needs to evaluate the discriminant?
2. What are the advantages and disadvantages in determining the points of intersection of a given linear quadratic system using the algebraic method verses the graphical method?
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.

Since you,  probably,  created this post on your own,  you, probably,  know the answer.


If not,  then read and learn from any  Algebra textbook.



Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Tell Larissa why the discriminant gives the number of zeros. This is reviewed in Intermediate Algebra textbooks.