If x^2 - ax + 4 > 0 for all real x, then find a.

Ans:
Hello Student,
Please find answer to your qustion


f(x) > 0
For all x belong to real.
So f(x) = 0 does not have any real root.
Discriment < 0
(-a)²– 4(4) < 0
a²– 16 < 0
(a – 4)(a + 4) < 0

Approved