Question

Solve the equation x2 = 81 by finding square root
this question is looking for two answers.

Answer 1

ok when you square root something there is always two answers, do you know why?

Answer 2

say I am looking at the square root of 16, that is obviously 4 right?

Answer 3

Yeah

Answer 4

so then could you also do the square root of 4?

Answer 5

ok but it could also be -4 do you see what i'm saying?

Answer 6

Ohhhhhh yeah okay

Answer 7

so this would be positive 9 and negative 9

Answer 8

Oh okay thank you!

Answer 9

no problem glad to help