Answer
28$r^{2}$ + r - 2
Work Step by Step
1. FOIL
(4r - 1)(7r + 2) = 4r(7r) + 4r(2) - 1(7r) - 1(2)
2. Multiply
28$r^{2}$ + 8r - 7r - 2
3. Add like terms.
28$r^{2}$ + r - 2
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