1
Question
Find the product by using the formula.
(5) (9 + 4p) (9 − 4p)
(5) (9 + 4p) (9 − 4p)
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Solution
(9 + 4p) (9 − 4p)
The given expression is of the form (a + b) (a − b).
Thus, we can use the identity (a + b) (a − b) = a2 − b2 .
∴ (9 + 4p) (9 − 4p) = (9)2 − (4p)2
= 81 − 16p2
The given expression is of the form (a + b) (a − b).
Thus, we can use the identity (a + b) (a − b) = a2 − b2 .
∴ (9 + 4p) (9 − 4p) = (9)2 − (4p)2
= 81 − 16p2
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