Determine the expression that shows a difference of perfect squares and factor it, showing work.

Mathematics

1 answer:

lara31 [8.8K]3 years ago

6 0

Answer is 1st option

16x²-81

(4x)² - 9²

Thus it is the difference of squares of 4x and 9

Factorising (4x)² - 9² , we would get:

(4x + 9)(4x - 9)

As a² - b² = ( a + b)(a - b)

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