Question

If the roots 2x2-6x+k =0 are real and equal then find k

Answer 1

answer is .. ... ... 4.5 it is correct

Answer 2

Formula for real and equal roots = ${b}^{2} - 4ac = 0</b>$

a = 2
b = -6
c = k

A/Q ,

${b}^{2} - 4ac = 0$
=> $({-6})^{2}$- 4 × 2 × k = 0
=> 36 - 8k = 0
=> 36 = 8k

=> $\frac{36}{8}$= k

=> $\frac{9}{2}$ = k

$\therefore$ k = 4.5