Which term does not describe the expression 4*220x+25?

Difference of squares. This is used in math. The difference of two squares is a number multiplied by itself, also known as squared. The squared number is then subtracted from another squared number. The difference of the squares may be factored.

An example is a2 - b2 = (a + B) (a-b). The difference of two squares s important in factoring polynomials. An example is x4 - 1, which can be factored down. It can also be used to find linear factors of two sums, as well as rationalizing of irrational denominators.