How do you solve 81x2−10=−1?
2 Answers
Jun 2, 2018
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=±√19←note plus or minus
x=±13
Jun 2, 2018