Find the product by using the formula.

(6) (2a + 3b) (2a − 3b)

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Solution

(2a + 3b) (2a − 3b)
The given expression is of the form (a + b) (a − b).
Thus, we can use the identity (a + b) (a − b) = a² − b² .
∴ (2a + 3b) (2a − 3b) = (2a)² − (3b)²
= 4a² − 9b²

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