Question 249938
x^2-8x+15=0
(x-5)(x-3)=0
x-5=0
x=5 ans.
x-3=0
x=3 ans.
The discriminate is b^2-4ac.
-8^2-4*1*15=-64-60=4 
Because the answer is a perect square then the answers are 2 real rational numbers.