'' please help me im stressing over this :(( please provide explanation '' Danielle needs your help! She is practicing operations with polynomials, but she keeps making mistakes! Find the error(s) that Danielle made for each problem. Help Danielle understand her mistake by explaining the error(s) and then correctly performing the operation.
( please give explanation on what Danielle did wrong )

She didn't changed the signs for last two terms

Step-by-step explanation:

Since there is a -ve sign in front of the 2nd prentheses, all the signs will change

therefore

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.