Question

Answer 1

=>(x-2)(x-5)=0

=>x=2 hoặc x=5

Answer 2

`-> x^2 - 7x + 49/4 - 9/4 = 0`.

`=> (x-7/2)^2 = 9/4`

`=> x-7/2 = +-3/2`

`=> x = 2` hoặc `x = 5`.