Verified answer

Yes, 4b² - 81 is a Difference of Two Squares

Difference of Two Squares

• a product of a binomial
• both terms, first and second, is square of an expression/number
• the binomial is separated by subtraction sign (-)

4b² - 81 is a binomial

Both terms, first and second, is a square of an expression/number which is 4b and 9, respectively.

The binomial is separated by the subtraction sign

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