Factor completely.
4x^2 - 1

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

Given the numbers c = –3 and d = 4, which statement is true? a. |–c| = 3 and |–d| = –4 b. |–c| = 3 and –|d| = –4 c. –|c| = –4 and –|d| = 3 d. |–c| = 3 and –|d| = 4

Given the equation −4  = 12, solve for x and identify if it is an extraneous solution.