Question

If the equation x2– 4x + a = 0 has no real roots then the value of a is ___​

Answer 1

Using quadratic formula

${b }^{2} - 4ac = 0$

a=1

b=-4

c=a

(-4)^2 -4×1×a=0

16-4a=0

16=4a

Therefore a=16/4=4

a=4

Hope this helps

Answer 2

Step-by-step explanation:

Using quadratic formula

$\begin{gathered}{b }^{2} - 4ac = 0 \\\end{gathered}$

b

2

−4ac=0

a=1

b=-4

c=a

(-4)² -4×1×a=0

16-4a=0

16=4a

Therefore a=16/4=4

a=4

Hope this helps. #HipHoptamizha