Question

1.    The roots of which of the following quadratic equations are
2 and -5?​

Answer 1

Step-by-step explanation:

Correct option is

A

True

(x−2a)(x−2b)=4ab

⇒ x

2

−2bx−2ax+4ab=4ab

⇒ x

2

−2(a+b)x=0

⇒ On comparing with,

⇒ We get, a=1,b=−2(a+b),c=0

⇒ Discriminant of the quadratic equation =b

2

−4ac

⇒ [−(a+b)]

2

−4×1×0

⇒ (a+b)

2

∴ b

2

−4ac>0

Thus, roots are real and distinct.