Find the center and the coefficient

Y=4x^2+x-1 solve using quadratic formula

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (-4, 0) and (6,0). the y-intercept of thefirst parabola is (0, –12). the y-intercept of the second parabola is (0-24). what is the positive difference between the avalues for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth.

Solve the equation. 2x - 8(x+1)= 6(2x - 3)