Question

Solve using the square root method. Round to the nearest tenth if necessary.

x2 + 15 =0

Answer 1

These are the answer choices:

A. {3.9}
B. {3.9, -3.9}
C. {7.5, -7.5}
D. no real solution

Answer 2

i dunno a sqrt method, but + added to + never gets to zero without being complicated

Answer 3

nope i got this :)...
x^2 = 15.
\[x= \pm \sqrt{15}\]

Answer 4

a little off:\[x=\pm\sqrt{-15}\]

Answer 5

4^2 ~ 16.
so 3.9 and -3.9

Answer 6

Op. got me ;)

Answer 7

*oops. you cant do sqrt(- negative numbers). that makes it a "complex" solution. so no real solution.

Answer 8

Oh, I see!! Thanks both of you! :)

Answer 9

:)

Answer 10

thanks amistre :P