quadratic formula am i wrong or the book? Watch

TimetoSucceed
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#1
Report Thread starter 7 years ago
#1
x^2 - 4x + 1

i got

2+sqrt6 and 2-sqrt6

book has 2+sqrt3 and 2-sqrt3
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connoryoung
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#2
Report 7 years ago
#2
the book is definitely right, sorry :P
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Gemini92
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#3
Report 7 years ago
#3
The book answers look right to me.

If you post your working, I might be able to see where you've gone wrong.
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StephenP91
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#4
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#4
You can check your answer you know. Just expand and see if you get the original equation out.
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Rickelton
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#5
Report 7 years ago
#5
2+(1/2)sqrt12 = 2+(1/2)sqrt3*sqrt4
= 2+(1/2)sqrt3*2
= 2+sqrt3
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TimetoSucceed
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#6
Report Thread starter 7 years ago
#6
what I did was

4+-sqrt16-4
/
2

=

4+-sqrt12
/
2

= 2+sqrt 6 and 2-sqrt6 =/
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TimetoSucceed
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#7
Report Thread starter 7 years ago
#7
nvm figured it out, problem i made was i didnt do sqrt4x3 instead of just halving sqrt12 =/
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