Answer:
Step-by-step explanation:
2) 3x⁴ - 25x³ + 27 = 3(2)⁴ - 25(2)³ + 27 = 3*16 - 25*8 +27 = 48 - 200 + 27
= -125
3) 20s⁴ + 24s³ + 4s = 20(1)⁴ + 24(1)³ + 4(1)
= 20 + 24 + 4 = 48
4) 6m⁴ - 4m +20 = 6(4)⁴ - 4(4) +20
= 6*256 - 16 + 20= 1536 - 16 + 20
=1540
5) - 7p⁴ - p + 9 = -7(-2)⁴ - (-2) +9 = -7*16 + 2 +9 = -112 + 2 + 9 = - 101
6) 6a⁷ - a³ + a = 6(-1)⁷ - (-1)³ + (-1) = 6*(-1) - (-1) - 1 = -6 + 1 - 1 = -6
