November 29, 2006

Dictionary

For those of us who missed out on our math dictionary I'll fill you in.
Well it's actually just the end of what we couldn't finish yesterday.

  • Being able to find the root sum and root product of f(x)=2x^2-6x+7
A=2 Root sum= -b/a Root product= c/a
B=-6
C=7 -(-6)/2 = 3 7/2

  • Find a quadratic function whose sum is -3 and whose product is 5/2

    Root sum= -b/a Root product= c/a
    -3/1 = -b/a 5/2= c/a

    -6/2 = -b/a both must have a common denominator 5/2= c/a
a=2 f(x)=2x^2+6x+5
b=6
c=5


No comments:

Post a Comment