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Dafna11 [192]
3 years ago
9

PLEASE HELP!!!!!!!!!

Mathematics
1 answer:
kolezko [41]3 years ago
4 0
Let x_1 , x_2 be the roots of the equation 3x^2-5x-7. By the Viet theorem you have that \left \{ {{x_1+x_2=- \frac{5}{3} } \atop {x_1x_2= \frac{-7}{3} }} \right..

For the equation x^2+bx+c = 0 you'll have that c=(x_1+2)(x_2+2)=x_1x_2+2(x_1+x_2)+4=\frac{-7}{3}+2\cdot(- \frac{5}{3} )+4
That is \frac{-7}{3}- \frac{10}{3} +4=- \frac{5}{3}.

Answer: - \frac{5}{3}
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