Question

check whether 1/2 is the zeros of the polynomial 2x square+x-1

Answer 1

Hi ,

let p( x ) = 2x² + x - 1


put x = 1/2 in p( x ) ,

p( 1/2 ) = 2 × ( 1/2 )² + 1/2 - 1

= 2/4 + 1/2 - 1

= 1/2 + 1/2 - 1

= 1 - 1

p( 1/2 ) = 0

Therefore ,

1 /2 is a zero of the polynomial p ( x ).

I hope this helps you.

:)

Answer 2

By Putting 1/2 in place of x, we get,

2(1/2)² +1/2 -1 = 0

=> 2(1/4) - 1/2 = 0

=> 1/2 - 1/2 = 0

=> 0 = 0


Hence, 1/2 is a zero of the guven polynomial.