Question

solve using the square root method. Round the solution to the nearest tenth. x^2-20=0

Answer 1

-4.5,4.5?

Answer 2

x^2-20=0
x^2-20+20=20
x^2=20
\[\sqrt{x^2}=\sqrt{20}\]
\[x=\sqrt{20}\]
\[x=\sqrt{4}\sqrt{5}\]
\[x=2\sqrt{5}\]

Answer 3

yes there should be \[\huge \pm \] when square rooting,
So its -4.5,4.5