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OpenStudy (anonymous):
Rewrite the expression without absolute value bars. | 21 |
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jimthompson5910 (jim_thompson5910):
how far is 21 from zero?
OpenStudy (anonymous):
x = |21| is same x = -21 or x = 21
jimthompson5910 (jim_thompson5910):
ginochen you're thinking of |x| = 21
OpenStudy (anonymous):
ah, sorry, I'm take a mistake @jim_thompson5910 it's right
OpenStudy (anonymous):
21 thats exactly what I thought! thanks for clarifying!
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jimthompson5910 (jim_thompson5910):
yep 21 is 21 units away from 0 so |21| = 21
jimthompson5910 (jim_thompson5910):
-21 is 21 units from 0 which is why |-21| = 21
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