If the roots of equation ax² +

STUDY MATERIALS
COURSES
MORE
SUCCESS STORY
ADMISSION
STORE

Back

JEE ADVANCE

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

JEE MAIN

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

NEET

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

BITSAT

CLASS XI - XII

CLASS XI - XII

CBSE BOARD

CLASS IX

CLASS X

CLASS XI

CLASS XII

CLASS VI

CLASS VII

CLASS VIII

UP BOARD

CLASS IX
CLASS X
CLASS XI
CLASS XII

CLASS IX

CLASS X

CLASS XI

CLASS XII

CUET

CRASH COURSE

CRASH COURSE

Courses

CLASSROOM COURSES
ONLINE COURSES

ONLINE COURSES

More

Solution

Q.
If the roots of equation $a x ² + b x + c = 0, a \neq 0$ are real and equal, then which of the following relation is true

1 $a = 2 b ² / c$

2 $b ² = 2 a c$

3 $a c = b ² / 4$

4 $c = 4 b ² / a$

Ans.
(3)

Given equation is $a x ² + b x + c = 0, a \neq 0 .$
For real and equal roots, D = 0.

⇒ $b ² - 4 a c = 0 \Rightarrow b ² = 4 a c \Rightarrow b ² / 4 = a c$

Want Us to Email you About Special Offers & Updates?