Question

If a + 1/a=4 find the value of a^2+1/a^2

Answer 1

Step-by-step explanation:

(a+a1)2=a2+a21+2=16

(a−a1)=a2+a21−2=16−2−2=12=23

(a2−a21)=(a+a1)(a−a1)=(4)(23)=83