Activity 5. Find all the real roots of the following polynomial equation:
1) (3x + 2) (x2 - 25) = 0
2) 2x3 - 3x2 - 8x + 12 = 0
3) 3x4 + 5x3 - 28x2 + 4x + 16 = 0
4) x5 – 2x4 + x3 - 2x2 - 2x + 4 = 0
5) x4 – 4x3 + 4x2 - 36x - 45 = 0
6) x4 + 10x + 9 = 0
7) x3 + 9x2 + 22x + 12 = 0
8) 4x3 - 18x2 + 10x - 1 = 0
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