Question 380335
(4n + 7)(4n − 7)
Use FOIL:
F: 4n*4n = 16n^2
O: 4n*-7 = -28n
I: 7*4n = +28n
L: 7*-7 = -49
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Combine these products to get:
16n^2-49
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Cheers,
Stan H.