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

Answer:

B.

Step-by-step explanation:

$x^2=20; \ => \ \left[\begin{array}{ccc}x=\sqrt{20} \\x=-\sqrt{20} \end{array} \ => \ \left[\begin{array}{ccc}x=2\sqrt{5} \\x=-2 \sqrt{5} \end{array}$