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}

Answer 1

D

Answer 2

x = sqrt{20}

x = 2sqrt{5}

D ?

Answer 3

D

Answer 4

All you have to do is find\[\sqrt{20}.\]Well,\[5^2=25\]is too large and\[4^2=16\]is too small. Do you think it could perhaps be in between 4 and 5?