Meaning that may be the question from the assignment is on Topic 5 or Topic 9 but current the class not even start Topic 1.
By the way, here are some continue for the question.
Show that x^2-5x+11 > 0 for all the integers
is it meaning that need to subtitute the x with 1,2,3,4 in the equation , what ever number get the value >0 is countable ?
Just a question, If based on Discriminant, when b^2-4ac is negative, so no real root, b^2 - 4ac < 0
How come we can use (x - 5/2)^2 + 19/4 > 0
2nd question, when we use the formula,
x= -b +- Sq root b^2-4ac / 2a
x= 5 + sq root.-19/2 , 5-sq. root-19/2
If based on the question, Show that x^2 - 5x + 11 > 0 for all integers x., i should use the answer from the formula or based on the answer from the completing the square ?