Question

The two roots of a quadratic equation are 2 and – 1. The equation is 

A) x² + x + 2 = 0 

B) x² – 2x + 2 = 0 

C) x² + 2x – 2 = 0 

D) x² – x – 2 = 0

Answer 1

Correct option is (D) x² – x – 2 = 0

Given that two roots of the quadratic equation are 2 and -1.

\(\therefore\)  Required quadratic equation is

(x - 2) (x+1) = 0

\(\Rightarrow x^2-2x+x-2=0\)

\(\Rightarrow x^2-x-2=0\)

Answer 2

Correct option is D) x² – x – 2 = 0