Solve each of the following expressions for z using the quadratic formula and the x is small approximation. In which of the following expressions is the x is small approximation valid?
Check all that apply.
a. x²/(0.2-2) 1.3 x 10⁻⁴
b. x²/(0.2-2) 1.3 x 10⁻⁴
c. x²/(0.2-x)= 1.3 × 10⁻⁴
d. x²/(0.01-) = 1.3 x 10⁻⁴