All you need to do for this is 155-75 which would be 80 :) hope this helps
(x + 8)(x - 6)
to factorise consider the factors of - 48 which sum to + 2
These are + 8 and - 6 thus
x² + 2x - 48 = (x + 8)(x - 6)
Answer:All you need to do is divide 80 by 10, and then multiply 10 by 3
It would be 6 and 1 cause:
6 × 1 = 6
6 + 1 = 7
Hope that helps :D