How do you solve 81x210=1?

2 Answers
Jun 2, 2018

x=±13

Explanation:

isolate 81x2 by adding 10 to both sides

81x2=1+10=9

divide both sides by 81

x2=981=19

take the square root of both sides

x2=±19note plus or minus

x=±13

Jun 2, 2018

x=±13

Explanation:

81x2=9

x2=981

x=±981

±39

±13