Question: 12) please help 4a3 + 3a2 - 2a + 7 - 2a 12a3 + 9a2 + -824 - 623 + A + 324 - 2a3
12) please help

4a3 + 3a2 - 2a + 7 - 2a 12a3 + 9a2 + -824 - 623 + A + 324 - 2a3 + 22 12. Use the Vertical Method to multiply (4a3 - 2a + 3a2 + 1) and (3 - 2a + a2). What would be the value of B? 144a3 4a5 - 524 + 14a2 - 8a + 3 4a3 O 144a9 O 20a3
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