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

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

anonymous · Answer

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

jhonyy9 · Answer

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

anonymous · Answer

what in the world is the answer to this?

anonymous · Answer

$$x^2 = 20$$
$$x = \pm \sqrt{20}$$
$$x = \pm \sqrt{4}\sqrt{5}$$
$$ x = \pm 2\sqrt{5}$$
$$x_1 = 2\sqrt{5} \approx 4.5$$
$$x_2 = -2\sqrt{5} \approx -4.5$$

so the right answer is D

anonymous · Answer

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