So first you multiply x and -3 by 4 to distribute, then you collect like terms so (-12+5=-7) , then you add seven to both sides and the -7+7 cancels out so you have 4x by itself, then you divide 4x/4 but it cancels out to and 8 by 4 to get x and you answer should be x=2. Hope this helped
a. The vertex is at (2,1) which is the highest point of the parabola. This applies to any parabola where it forms a hill like this.
b. The line of symmetry is x = 2. It is the vertical line through the vertex. The line of symmetry cuts the parabola into two equal halves (one half mirrors over the line to get the other half).
c. The x intercepts are x = 1 and x = 3, which is where the parabola crosses the x axis. More specifically the locations are (1,0) and (3,0).
d. The y intercept is where the graph crosses the vertical y axis. The y intercept is -3, so its location is (0,-3). A function can only have one y intercept.