6th grade distributive property 25 pts solve all plz

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

What can each term of the equation be multiplied by to eliminate the fractions before solving? x – + 2x = + x 2 6 10 12

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1