Simplify the expression.
x2 - 9
x2 + 4x + 3

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Daryl factors the polynomial p(x)=x3+x2−26x+24 to rewrite it as p(x)=(x+6)(x−4)(x−1). which equations must be true? there may be more than one correct answer. select all correct answers. p(1)=0 p(−4)=0 p(−1)=0 p(6)=0 p(4)=0 p(−6)=0

Need plz been trying to do it for a long time and still haven’t succeeded