Question

Check whether 1 and -1/2 are the zeros of the polynomial f(x) = 2xsquare -x-1

Answer 1

Answer:

2x^2-×-1=0

2×^2+2×-×-1=0

2×(×+1)-1(×+1)=0

(2×-1)(×+1)=0

2×-1=0 or ×+1=0

2×=1 or ×=-1

×=1/2 or -1