Find the given product. (See Examples 8–10.)
(5r − 3s)(5r − 4s)
Example 10
Use FOIL to find the product of the given polynomials.
(a)
(b) (x + 3)2 = (x + 3)(x + 3) = x2 +3x + 3x + 9 = x2 + 6x + 9
(c) (2x + 1)(2x − 1) = 4x2 − 2x + 2x − 1 = 4x2 − 1
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