Let fx 3x 7 and gx 2x2 3x 2 Find a f g and b f middot

Let f(x) = 3x + 7 and g(x) = 2x^2 - 3x + 2. Find a) f + g and b) f middot g

here f(x)=3x+7 and g(x)=2x^2-3x+2

a) f+g =3x+7+2x^2-3x+2

=2x^2+3x-3x+7+2

=2x^2+9

b) f.g=(3x+7)(2x^2-3x+2)

=3x(2x^2-3x+2)+7(2x^2-3x+2)

=6x^3-9x^2+6x+14x^2-21x+14

=6x^3-9x^2+14x^2+6x-21x+14

=6x^3+5x^2-15x+14