Question

Which of the following quadratic equations has roots 2,-1?​

Answer 1

Answer:

If x=k is a root, then (x−k) is a factor.

Roots: x=2 and x=−1 .

Factors: (x−2) and (x+1) .

One quadratic equation whose roots are 2 and −1 :

(x−2)(x+1)=0

x2−x−2=0

All quadratic equations whose roots are 2 and −1 :

a(x2−x−2)=0

Step-by-step explanation:

please mark me as a Brainlist