Solution for [4-(3c-1)][6-(3c-1)]
[4 - (3c - 1)][6 - (3c - 1)]
= [4 - 3c + 1][6 - 3c + 1]
= [5 - 3c][7 - 3c]
= 35 - 21c - 15c + 9c²
= 35 - 36c + 9c²
Thank you so much!
