Question

What are the solutions to the equation x2 = 81?

Answer 1

\[x^2=9^2\]

Answer 2

ok cool! thanks

Answer 3

its gonna be +9 and -9 cause when you find the sqrt there are two solutions a positive and a negative

Answer 4

ok that is one of the answers so is only 9

Answer 5

9*9=81 (-9)(-9)=81 as well

Answer 6

soo is it -9 and 9

Answer 7

ya!

Answer 8

yea but if there isnt an answer choice like that dont worry about it for now. ask your teacher though and look smart

Answer 9

\[Formula:-> x^2=a^2\]

Answer 10

Then, \[x= \sqrt{a^2}=\pm a\]