Question

Please help thank you.

Solve the following equation algebraically:
x = 20
a. 4.47
b. -3.97, 3.97
C. -10, 10
d. 4.47, 4.47
Please select the best answer from the choices provided
A
B
Mark this and return
SU

Answer 1

D

Explanation:

Answer 2

Option D

Explanation:

Whenever we take a square root of a number the ± sign is with it like here in the question

`x^2=20\\\\Apply\ square\ root\ on\ both\ sides\\sqrt{x^2}=√(20) \\\\The\ square\ cancels\ out\ with\ the\ root\x=√(20)`

And then x = ±4.47 which means x has two values one is +4.47 and the other is -4.47 so Option D is our answer.