B.Factor each of the following completely, if the expression is not factorable write prime. 1. 4a + 28 = _________________________________
2. 3x - 24 = ___________________________________
3. 5a + 2ab - 4 = _______________________________
4. 18y4 + 30y2 - 42y = ___________________________
5. 4m6n - 8m8n2 - 16m10n3 = ____________________