Answer:
2/10 and 0.2
Step-by-step explanation:
i^32=1
i^25=i
i^86=-1
i^51=-i
Follow the Rule of Four of I for this,
i^1=
I^2=-1
I^3=-i
I^4=1
x^7-14x^6+84x^5-280x^4+560x^3-672x^2+448x^2-128
ends are x^7 and 120^7, and use the therom in the middle