Question

if 4x^2 -12x+a=0 roots are equal then find a=?

Answer 1

Hello dear....here is your answer

4x^2-12x+a=0

if roots are equal then b^2-4ac=0

(12)^2-4×4×a=0

144-16a=0

a=144/16

a=9

hope it helps

Answer 2

Solution:-
given,

4x^2 -12x+a=0
comparing for ,

equetion = Ax^2 +Bx+C = 0

= A=4 , B= -12, C = 0

=
${b}^{2} = 4ac \\ {( - 12)}^{2} = 4 \times 4 \times a \\ 144 = 16a \\ a = \frac{144}{16} \\ (a = 9)ans$