Question

If $f=\left\{\right(4,5),(5,6),(6,-4\left)\right\}$ and $g=\left\{\right(4,-4),(6,5),(8,5\left)\right\}$.
Then
$2f+4g$

Answer 1

$f=(4,5),(5,6),(6,-4),$

$2f=(8,10),(10,12),(12,-8)$

$g=(4,-4),(6,5),(8,5),$

$4g=(16,-16),(24,20),(32,20)$

$2f+4g=(8+16,10-16),(10+24,12+20),(12+32,-8+20)$

$2f+4g=(24,-6),(34,32),(44,-12).$

Hence, this is the answer.