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anonymous
 one year ago
Which are real zeroes of this function?
x3 + 2x2 – 9x – 18
anonymous
 one year ago
Which are real zeroes of this function? x3 + 2x2 – 9x – 18

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.01, 2, 3 3, 3, 2 2, 3, 6 1, 1, 18 2, 3, 3

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0since you have choices, you could check them plug in the numbers and see which ones give you zero or you could cheat which is a lot easier

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0\[f(x)=x^3 + 2x^2 – 9x – 18\] lets try 1

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0\[f(1)=1+2918\]which , whatever it is, is not 0, so we can eliminate any answer with 1 init

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0@aloud yeah i think so

misty1212
 one year ago
Best ResponseYou've already chosen the best response.0ok now the cheat method http://www.wolframalpha.com/input/?i=x%5E3+%2B+2x%5E2+%E2%80%93+9x+%E2%80%93+18
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