For this equation we are factoring. When you do this. You get the answer of:
(-3x²+8x-7)
Look at the equation backwards, its minus 6 every time. so therefore the ninth term would be 51. double check yourself count up + 6 til you get to the ninth term! :)
That would be 8
8 square is 64 + 8 is 72 :)
