Question

1.If x2 = 60, what is the value of x?

Answer 1

Q1, The answer is B. plus or minus the square root of 60

x² = 60
x = ?

Since a² = -√a or a² = +√a, then
x = -√60 or
x =  +√60


Q2. The answer is C. 2.83 inches

The area of the square (A) with side s is:
A = s²
Since A = 8 in², then s² = 8 in²
s = √8 in² 
s ≈ 2.828 in
s ≈ 2.83


Q3. The answer is D. plus or minus 11

x² = 121
x² = 11²
Since a² = -√a or a² = +√a, then
x = -√11²      or      x = +√11²
x = -11          or      x = + 11