Mathematics, 31.12.2019 04:31, electrofy456
Find all positive integer values of $c$ such that the equation $x^2-7x+c=0$ only has roots that are real and rational. express them in decreasing order, separated by commas.
Answers: 1
has real and rational roots if 
is a nonnegative perfect square. 
.
on both sides:
.
has to be a positive integer.
returns 
which is not a perfect square.
returns 
which is not a perfect square.
returns 
which is not a perfect square.
returns 
which is not a perfect square.
returns 
which is not a perfect square.
returns 
which is a perfect square.
returns 
which is not a perfect square.
returns 
which is not a perfect square.
returns 
which is not a perfect square.
returns 
which is a perfect square.
returns 
which is not a perfect square.
returns 
which is a perfect square.
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Find all positive integer values of $c$ such that the equation $x^2-7x+c=0$ only has roots that are...
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