Question

x^2-4x+a=0 ; x=2 than a=?​

Answer 1

2^2 - 4 + a = 0

=> 4 - 4 + a = 0

=> 0 + a = 0

=> So a = 0

Answer 2

Step-by-step explanation:

for x=2

x^2-4x+a=0

=>(2)^2-4×2+a=0

=>4-8+a=0

=>a-4=0

=>a=4