what is the simplified form of the following expression
|dw:1379639135923:dw|
the square root of 1/44
you know the square root of 144 ?
0.02272727272 I think its tht
lemme give you the multiple choice answers 1/12 1/288 12 2/144
can you factor 144 ??? like 70 will be 2*5*7
im not sure what it would be
then start dividing it by 2, if you can 144/2 = .. ?
72
72 divided by 2 is 36
36 divided by 2 18
go on ..
18 divided by 2 9
9 divided by 2 is 4.5
correct! now 9 is not divisible by 2, then take next number 3 9/3 = ... ?
you get 4.5 but thats not an integer, thats why we got to 3
3
lol 9/3 is 3
yes, and 3/3 is 1 you stop when u get 1 so the factors are 144 =2*2*2*2*3*3 got this ?
ya so that's the factor
yup, now since we are taking square root, we combine 2 numbers ata atime like 5*5*7*7 would be 5^2 * 7^2 so what about 2*2*2*2*3*3 ??
and square root of (5*5)*(7*7) will be 5*7 what about 2*2*2*2*3*3 ? hint : (2*2)*(2*2)*(3*3)
wait what are you asking
we have 144 as 2*2*2*2*3*3 right ?? i just grouped 2 numbers at a time (2*2)*(2*2)*(3*3) any doubts here ?
no but what do you want me to do next
i want you to realize that when we take the square root of that we will consider the group as one number, \(\sqrt{(2*2)*(2*2)*(3*3) }= 2*2*3\) got this ?
ya sorta
ya and when you do the multiplication it makes 144
sol \(\sqrt{144}=2*2*3 = .. ?\)
wait is the answer to this question 1/12
yes, it is! \(\sqrt {144}=12 , 1/\sqrt{144}=1/12\) :)
I forgot the pemdas on the other thing affects the answer
yay thx!!!!!! tht really helped I understand it a lot better now
i am glad to hear that! welcome ^_^
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