How do you solve 81x^2-10=-1?
2 Answers
Jun 2, 2018
Explanation:
"isolate "81x^2" by adding 10 to both sides"
81x^2=-1+10=9
"divide both sides by 81"
x^2=9/81=1/9
color(blue)"take the square root of both sides"
sqrt(x^2)=+-sqrt(1/9)larrcolor(blue)"note plus or minus"
x=+-1/3
Jun 2, 2018