Foil it out:
(7x)(4x)+(7x)(9)+(-8)(4x)+(-8)(9)
28x^2+63x-32x-72
28x^2+31x-72
Answer:
I have to text you here cuz it dosent let me txt you in other place
It is in simplified form. You cannot add these together because they are different terms. EX: bc, b, and c. They don't correspond, so we can't add/subtract/multiply/divide.