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 Calculator keeps giving different answer than book, is the order wrong?

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$${\frac{\left({\mathtt{\,-\,}}\left({\mathtt{3}}\right){\mathtt{\,\small\textbf+\,}}{\mathtt{sqrt11}}\right)}{{\mathtt{2}}}} = {\mathtt{0.158\: \!312\: \!395\: \!177\: \!699\: \!9}}$$

my book shows 1.193 and -4.193 as answers and I havent been able to get either of those answers using a calculator from an app or online, I dont own one.

 Dec 16, 2014

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 #2
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If the book is giving two ansers, most likely it is a quadratic formuloa, which either youre calculator can not do or you are inputting it incorrectly. If you can not solve the quadratice using your head, Use the formula:

 

 Dec 16, 2014

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 #1
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Were you solving a quadratic equation?  Did you use the quadratic formula?

What was the original problem?

I believe that a mistake was made before you got the answer (-3 +√11)/2.

 Dec 16, 2014
 #2
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+5
Best Answer

If the book is giving two ansers, most likely it is a quadratic formuloa, which either youre calculator can not do or you are inputting it incorrectly. If you can not solve the quadratice using your head, Use the formula:

 

Guest Dec 16, 2014
 #3
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Replace the sqrt(11) term with sqrt(29) and you'll get the book's answers.  

 

Don't forget that sqrt(29) can be positive or it may be negative. Try both. 

 Dec 16, 2014

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