f(x) = 2x – 1, r(x) = x + 2 ; (f•r)(x)
(f•r)(x) = (2x – 1)(x + 2)
(f•r)(x) = 2x² + 4x – x – 2
(f•r)(x) = 2x² + 3x – 2
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f(x) = 2x – 1, r(x) = x + 2 ; (f•r)(x)
(f•r)(x) = (2x – 1)(x + 2)
(f•r)(x) = 2x² + 4x – x – 2
(f•r)(x) = 2x² + 3x – 2