In Quadratic Equations. If the Question says find the maximum value of: y= 7+10x -5x^2 , Do we need to take y (variable) to the other side before applying the formula 4ac-b^2 by 4a? Or Does the value of y in this equation doesn't matter? Also I wanted to confirm, as we casually change the signs of the equations by multiplying the whole equation by minus 1, does that mean we are flipping the whole curve and the new new curve's maximum will the the old curve's minimum and vice versa?