Final answer:
A polynomial that is a difference of squares is of the form 'a² - b²' which can be factored using the formula (a + b)(a - b).
Explanation:
A polynomial that is a difference of squares is of the form a² - b², where 'a' and 'b' are terms or expressions. This can be identified by seeing that it consists of two perfect squares being subtracted. To factor a difference of squares, you use the formula (a + b)(a - b), where 'a' and 'b' are the square roots of the terms.
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