I'm hoping to get a purely algebraic approach to this one. Preferably using discriminant if possible.
OA is 42
OA is 42
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can help with algebraic approach, yet discriminant solution is tediousknight247 wrote:I'm hoping to get a purely algebraic approach to this one. Preferably using discriminant if possible.
OA is 42
I am using FOIL for p^2-kp-28=0
possible solutions (p-28)(p+1)=0, (p-14)(p+2)=0, (p-7)(p+4)=0
in all solutions we get the value -28 for independent argument (C) and different values for k such as -28+1=-27, -14+2=-12, -7+4=-3. Since k is positive and our quadratics contains -1*k we obtain the sum of all possible values for k as 27+2+3=42
