if a^2-3a+1=0 find a^2+(1/a^2)
Answers
Answered by
11
Answer:
a^2-3a+1=0
a^2+1=3a
a+1/a=3.
then, (a+1/a)^2=(3)^2
a^2+1/a^2-2=9
a^2+1/a^2=11
Similar questions