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OpenStudy (anonymous):
Help please How to express f(x) = 2^2-4x-7 in the form f(x) = a(x+b)^2 + c. hence find the minimum value of f(x)
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OpenStudy (campbell_st):
well start by grouping things \[f(x) = (2x^2 - 4x + 2) - 9\] take 2 out as a common factor \[f(x) = 2(x^2 - 2x+ 1) - 9\] factor the quadratic... hope it helps
OpenStudy (anonymous):
i see now.. thank you veryvery much :D
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