Question

Solve using the square root method. Round the solution to the nearest tenth. x2 - 20 = 0
A. {-10.0, 10.0}
B. {-5.5, 5.5}
C. {-3.5, 3.5}
D. {-4.5, 4.5} Solve using the square root method. Round the solution to the nearest tenth. x2 - 20 = 0
A. {-10.0, 10.0}
B. {-5.5, 5.5}
C. {-3.5, 3.5}
D. {-4.5, 4.5} @Mathematics

Answer 1

See the other reply to your question and this problem should become rather easy to solve.

Answer 2

x2 =4x5
x_1,2=+/- 2sqrt5

Answer 3

what in the world is the answer to this?

Answer 4

\[x^2 = 20\]
\[x = \pm \sqrt{20}\]
\[x = \pm \sqrt{4}\sqrt{5}\]
\[ x = \pm 2\sqrt{5}\]
\[x_1 = 2\sqrt{5} \approx 4.5\]
\[x_2 = -2\sqrt{5} \approx -4.5\]

so the right answer is D

Answer 5

There it is...haha no calculator so I didn't compute 2root5