Question

The quadratic equation whose roots are 1 and -1/2 is * 2x^2+x-1=0 2x^2-x-1=0 2x^2+x+1=0 2x^2-x+1=0

Answer 1

Answer: option A. 2x^2 + x - 1.

Step-by-step explanation:

The roots are 1 and -1/2.

0= k[X^2 + (1+(-1/2))X +(1× -1/2)]

0= K[x^2 + (1/2) x -1/2]

Let k = 2,

2 x^2 + x - 1 = 0.