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…

Question

asked Nov 23, 2021 89.2k views

2 Answers

Pieter Ennes · Answer 1 · 2021-11-28T10:16:45+0000

Answer:

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.