Simplify each expression. 1) − a3 − a2 +6a − 21 when a = − 4 2) n2 + 3n − 11 when n = − 6 3) n3 − 7n2 + 15n − 20 when n = 2 4) n3 − 9n2 + 23n − 21 when n =5 5) − 5n4 − 11n3 − 9n2 − n − 5 when n = − 1 6) x4 − 5x3 − x + 13 when x =5 7) x2 + 9x + 23 when x = − 3 8) − 6x3 + 41x2 − 32x + 11 when x = 6 9) x4 − 6x3 + x2 − 24 when x =6 10) m4 + 8m3 + 14m2 + 13m + 5 when m = − 6
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ANSWERS -
1) 3
2) 7
3) -10
4) -6
5) -7
6) 8
7)5
8) -1
9) 12
10) -1
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