Answer:
I know this is really late but if anyone else needs help I hope this will help those people.
Step-by-step explanation: so expand (3x+5) (X-2) first apply FOIL method: (a+b) (c+d)= ac + ad +bc + bd..... a= 3x, b=5, c=x, d= -2. our end product would be 3xx+3x(-2) + 5x + 5(-2).
Then apply minus-plus rules: +(-a)= (-a)...... we would end up with 3xx-3 times 2x + 5x - 5times 2.
next simplify until we end up with 3x^2 - x- 10
Not 100% sure if this is what your looking for but this is my best educated guess from the question asked.