Wednesday
May 22, 2013

# Homework Help: intermediate algebra

Posted by TB on Wednesday, August 22, 2012 at 12:34pm.

given the quadratic function f(x)=9x^2+36x+36, finda value of x such that f(x)=9

• intermediate algebra - Steve, Wednesday, August 22, 2012 at 2:40pm

so, solve 9 = 9x^2+36x+36
or, 9x^2+36x+27 = 0

surely that doesn't pose any difficulties, eh?

It may be easier if you factor out a 9:

x^2 + 4x + 3 = 0

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