Which expression is equivalent to 6x*3 + 3y*2 - 5x*3 + 2y*2

Answer this question only if you know the answer! 30 points and

The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?