The positive integer c for the expression to have a rational root is 8
Calculate the rational root of a function
For a quadratic equation to have a rational root, then;
[tex]b^2-4ac =0[/tex]
From the given equation;
a = 3
b = 20
Substitute into the equation above to have:
20^2-4(3)c = 0
400 - 12c = 0
12c =100
c = 100/12
c= 8.3
Hence the positive integer c for the expression to have a rational root is 8
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