Question

the roots of quadratic equation is 2and -1​

Answer 1

Step-by-step explanation:

so you need to form the equation right,

You can follow the formula where alpha and beta are roots.

so,

(x-alpha)(x-beta)=0

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

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

x^2+x-2x-2=0

Therefore your quadratic equation is

x^2-x-2=0 (Ans)