Question

If a^2+a+1=0, find a^3

Answer 1

Answer:

1

Step-by-step explanation:

using the formula find roots .u will get omega as a root ..and cube of omega is 1

Answer 2

   a  

2

−3a+1=0

=>a  

2

+1=3a

=>a+  

a

1

​

=3

Squaring both the sides,

(a+  

a

1

​

)  

2

=3  

2

 

a  

2

+(  

a  

2

 

1

​

)+2×a×  

a

1

​

=9

a  

2

+  

a  

2

 

1

​

=9−2

a  

2

+  

a  

2

 

1

​

=7