Question

3t 2 - 5t 2 - 11t - 3t 2 +5t +11=

Answer 1

3t²-5t²-11t-3t²+5t+11=-5t²-6t+11
-5t²-6t+11=0
D=36-4*(-5)*11=36+220=256
D=√256=16
$x = \frac{6 + 16}{2 \times ( - 5)} = \frac{22}{ - 10} = 2 \frac{2}{10}$
$x = \frac{6 - 16}{ - 10} = \frac{ - 10}{ - 10} = 1$
Ответ:(1; 2 2/10)