can someone help me undo this square root: c^2 = 169?
回答 (5)
2016-04-18 5:59 pm
✔ 最佳答案
There are two solutions to that:13 * 13 = 169
-13 * -13 = 169
To solve this you would take the square root of both sides; but remember the ± sign:
c = ± √169
c = ± 13
Answer:
c = -13 or c = 13
2016-04-18 6:01 pm
c² = 169
c² - 169 = 0
c² - 13² = 0
(c - 13)(c + 13) = 0
c - 13 = 0 or c + 13 = 0
c = 13 or c = -13
c² - 169 = 0
c² - 13² = 0
(c - 13)(c + 13) = 0
c - 13 = 0 or c + 13 = 0
c = 13 or c = -13
2016-04-18 6:10 pm
Just square root both sides.
c = +/- sqrt(169)
c = +/- 13
simple as that.
c = +/- sqrt(169)
c = +/- 13
simple as that.
2016-04-18 6:03 pm
c² = 169
c = ± 13
c = ± 13
2016-04-18 6:09 pm
c = 13.
收錄日期: 2021-04-18 14:44:57
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