Theo viet ta có :
\(\left\{{}\begin{matrix}x_1x_2=m\\x_1+x_2=m+1\end{matrix}\right.\)
Theo bài ra ta có :
x1x2+2(x1+x2)-19=0
=>m+2.(m+1)-19=0
=>m+2m+2-19=0
=>3m-17=0
=>m=\(\frac{17}{3}\)
Vậy vs m=\(\frac{17}{3}\) thì pt có 2 no t/m ...
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