tinaballerina
HELPPP FAST :( sqrt 5(8+3 sqrt 6)
8 sqrt5 + 3 sqrt30
5 sqrt 10
130
None of the above
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sritama
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\[\sqrt{5}(8+3\sqrt{6)}\]
sritama
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is it the problem @tinaballerina ?
tinaballerina
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yessum @sritama
sritama
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just multiply \[(8+3\sqrt{6}) with \sqrt{5}\]
sritama
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you will find option A is correct
tinaballerina
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Thank you very much @sritama
tinaballerina
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could you help with my other problem?
sritama
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welcome :) yeah,i will try..
tinaballerina
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you seem to comprehend my questions , while everyone else is smart about their answers
sritama
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oh,is it? :)
tinaballerina
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\[(4-\sqrt{3} )(12+5\sqrt{3)}\]
sritama
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\[(4\times12)+20\sqrt{3}-12\sqrt{3}-15\]
sritama
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the answer is 33+8 sqart 3
tinaballerina
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ugh i need to understand this by early january for finals but , how did you learn all of this so well? do you have any ways to understand better or any websites?
sritama
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actually all you have to do is to multiply
sritama
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if you have a problem like that \[(a+\sqrt{b})(c+\sqrt{d})\] the answer is \[ac+c \sqrt{b}+a \sqrt{d}+\sqrt{bd}\]
tinaballerina
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OH I REMEMBER NOW.
tinaballerina
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F. O. I. L
tinaballerina
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Thank you so very much
sritama
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yeah..right :)
tinaballerina
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i wanna see if i get this problem right, will you check it??
sritama
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of course..
sritama
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post it
tinaballerina
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\[(5+\sqrt{3}) (5-\sqrt{3})\]
tinaballerina
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\[25-12\sqrt{3}\]
sritama
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can you tell me how do you got it?
tinaballerina
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5x5 first,
equaling 25
sritama
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right,then?
tinaballerina
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sqrt 3 times 5
sritama
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yes..next?
tinaballerina
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sqrt 3 times - sqrt 3
tinaballerina
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oh im sorry i skipped one
tinaballerina
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5 times -sqrt 3
sritama
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yes,it will be -5 times sqrt 3
tinaballerina
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-5?
sritama
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yeah,|dw:1355982996650:dw|
sritama
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tell me if you dont get it..
tinaballerina
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i believe i do :))!
sritama
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ok,now say what will be the answer? :)
tinaballerina
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sritama
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the answer will be the first one..
tinaballerina
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22?
sritama
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yes
sritama
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|dw:1355983409853:dw|
tinaballerina
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ah i see
sritama
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ok,you get it?
tinaballerina
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yes! thank you
sritama
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heartily welcome..