Write as a product 7+24b-16b^2

X+ y = k 2x + 3y = k + 1 the point of intersection of the lines has an x-coordinate of a.2k + 1 b.-2k + 1 c.2k - 1

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

I’m really confused and need your assist me with this question i’ve never been taught