Answer
$a^{2}$ + 12a + 35
Work Step by Step
(a + 5)( a+ 7 ) FOIL method
(a)(a) + (a)(7) + (5)(a) + (5)(7)
$a^{2}$ + 7a + 5a + 35
$a^{2}$ + 12a + 35
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