What phrase translates this expression 56,4x

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

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?