Free interactive math game: Binomial Squared — (x + a)². Part of the Algebra & Sets category on MathKite.
Taken from the generator that powers this exercise. A fresh set appears every time the page is opened, and the printable worksheet holds ten of them.
Squaring a bracket with two terms.
The result is the first term squared, plus twice the product of the two, plus the second squared.
(x + 3) squared is x squared + 6x + 9.
Squaring each term and stopping. The middle term is the part almost everyone forgets.