Which of the following is the set of roots of the quadratic equation x2−x−20=0 ?
A
{4,5}
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
{−4,−5}
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
{4,−5}
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
{−4,5}
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
The correct option is D{−4,5} Given quadratic equation, x2−x−20=0
Using the factorization method, ⇒x2+4x−5x−20=0 ⇒(x−5)(x+4)=0 ⇒x−5=0 or x+4=0 ⇒x=5 or x=−4