sbutcher19
sbutcher19
31-03-2016
Mathematics
contestada
solve by factoring by grouping 5k^2-2k-7=9
Respuesta :
Exvited
Exvited
31-03-2016
[tex]5k^2-2k-7=9 \\ \\ 5k^2 - 2k - 7 - 9 = 0 \\ \\ 5k^2 - 2k - 16 = 0 \\ \\ 5k^2 + 8k - 10k - 16 = 0 \\ \\ k(5k + 8) - 2(5k + 8) = 0 \\ \\ (5k + 8)(k - 2) = 0 \\ \\ k = - \frac{8}{5} , 2 \\ \\ [/tex]
The final result is:
k = -8/5, 2
.
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