5+5=?

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In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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.

What is x3+3x2−16x−48 divided by x−1?