Freaky problem
Algebra
Level
1
The roots of the quadratic equation 3x²-kx+14=0 are in the ratio 7:6then k equals?
The answer is 13.
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1 solution
Let the 2 roots be 7h and 6h. Then, 7h+6h=k/3. and 7h*6h=14/3. Solving the simultaneous equations, we get k=+ or - 13