Math, asked by prakashsjep, 1 year ago

For what values of ‘a’ the quadratic equation 9x2 – 3ax + 1 = 0 has equal roots ?

Answers

Answered by soumya1201
7

Answer:

a quadratic equation will have same roots when its discriminant is zero

so D=0

√(b²-4ac)=0

here b=3a

a =9

c=1

9a²=4×9×1

a²= 4(9 cancells out)

a=±2

Answered by jeena227
3

Answer:

Step-by-step explanation:

a=9 b= -3a c=1

b^2-4ac=0

(-3a)^2- 4(9)(1)

9a-36

9a=36

a=36/9

a=4

-b+or- root b^2-4ac /2a

-(-3a)+or- root 4/ 18

3a+2/18 or 3a-2/18

a+1/3 or a-1/3

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