Markitos
My teacher said i did these wrong can anyone explain how to properly solve these questions for me? it says i have to evaluate the expression i thought it was correct but now im confused
2. 5 |-4 + 3| = 15
3. -2 + 3 |-4| = -3
4. | -2 + -4|
----------- = 0
6
5. 3| -2+-6| + -3 = -8
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SmokeysTheName
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you have to get the absolute value sign alone first.
msingh
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|dw:1359567381118:dw|
SmokeysTheName
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so for number 2
divide 5 to both sides.
msingh
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@Markitos , r u getting vat is done
msingh
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|dw:1359567550593:dw|
msingh
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@Markitos , solve the second part, and do take care of one thing that the expression which is in |dw:1359567749335:dw| sign becomes +ve when it is negative. this sign is called mod which converts -ve sign into +ve
Markitos
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|dw:1359568063833:dw|
Markitos
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and how does the -1 become a positive one?
msingh
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because it is in mod sign , as i have already told that the expreesion in this mod sign becomes always +ve , if it is -ve
Markitos
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ok
Markitos
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what about the last part 5= 15
Markitos
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or is it 5 | | 15
msingh
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as LHS is not equal to the RHS
So |dw:1359568254047:dw|
Markitos
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and where does the 11 come from
Markitos
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how would i type that in word
msingh
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no there is no 11, when LHS is not equal to RHS, then we put equal sign but we place a cross sign on that
first write equal sign
msingh
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|dw:1359568380656:dw|
like this
msingh
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then draw a line which cuts it
like this|dw:1359568409476:dw|
Markitos
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ok
Markitos
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got it
Markitos
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now is am i finished with this one
msingh
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yup
msingh
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k.. do the second part, so that i should leave
Markitos
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what do i need to do for the second part
msingh
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solve it
Markitos
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how
Markitos
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im very bad at math can you explain to me how to
Markitos
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i get the first part of what u said
msingh
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-2 + 3 |-4| = -3
-2 + 3 (4) = -3
-2 +12 = -3
msingh
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|dw:1359568963469:dw|
msingh
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hope u understand and try the next parts also.
Markitos
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ok i get that
Markitos
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so if the number in the bracket is negative then it becomes positive and you put parenthesis around correct
Markitos
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and how did you get the nine and 3
msingh
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i just put the bracket to see the difference, it doesnot matter either u put bracket or not.
msingh
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-2+12=9
msingh
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i m leaving now, if any problem , then ask me later on
Markitos
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ok and for this 2 + 3 (4) how did you get the 12
Markitos
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ok
precal
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|dw:1359576231730:dw|order of operation, you must multiply first then add