November 29, 2006


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
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

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