How do you write the quadratic in vertex form given $x^2-7x + 9$ ?

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Answer 1 · 2015-05-15T01:07:32

$(-b/(2a)) = 7/2$

$f(-b/(2a)) = 49/4 - 49/2 + 9 = -49/4 + 9 = -13/4$

Factored form: $f(x) = (x - 7/2)^2 - 13/4$

Check. Develop $f(x) = x^2 - 7x + 49/4 - 13/4 =x^2 - 7x + 9$ . Correct

How do you write the quadratic in vertex form given x^2-7x + 9x^2-7x + 9?