4 The expression (2x² + 6x + 5)-(6x² + 3x + 5) is equivalent to
1) 4x2 + 3x
2) 4x2 – 3x
3) 4x2 – 3x + 10
4) 4x2 + 3x - 10

Find the sum of the following series. round to the nearest hundredth if necessary.

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?