What factor will we multiply by 3 to stay equivalent to 3x+9? 3( _+ _ )
3(x+6)

3(x+3x)

3(x+3)

3(x+1)

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0 

Value for line ac: (3x+6)+(2x+14)= 5x+20