Use the identity below. Calculate three numeric examples that follow by substituting for x. Then prove that the identity is true, using the basic rules of algebra. (x^2-x)(x+1) = (x^2+x)(x-1)

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