Question

Find the solutions to x2 = 20.

O A. x = +10-12
XE
B. X = +2,5
X =
O C. * = +2./10
O D. x= 1512
X=

Answer 1

B.

Explanation:

`x^2=20; \ => \ \left[\begin{array}{ccc}x=√(20) \\x=-√(20) \end{array} \ => \ \left[\begin{array}{ccc}x=2√(5) \\x=-2 √(5) \end{array}`