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OverLord2011 [107]
3 years ago
12

Which of the numbers listed below are solutions to the equation? Check all that apply. x2 = 81 A. 18 B. 40.5 C. -9 D. 162 E. 9 F

. 6561
Mathematics
2 answers:
Harman [31]3 years ago
5 0
If 81 equals to x² (so the unknown number is 81 when x is squared), the to find x you do the square root of 81.

x = ±√81

x = <span>±9

Answers are either C and E</span>
Murljashka [212]3 years ago
3 0
X^2 = 81...take the square root of both sides, eliminating the ^2
x = (+-) sqrt 81
x = (+-) 9

answers are : -9 and 9
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