maths inequalities...
posted by Bailey .
Find the range of values of k for which the expression x^2 4x + k will be positive for all real values of x. Hence state the range of values of x satisfying the inequality x^2 4x + 7 > 0.
For the first part, this is what i did:
(4)^2  4(k) > 0
k<4
but how do i do the second part ("hence...")????
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