Expression Equals Zero
Source:
February 11, 2009
Problem Statement
The expression \sqrt{25\minus{}t^2}\plus{}5 equals zero for:
(A)\ \text{no real or imaginary values of }t \qquad
(B)\ \text{no real values of }t\text{ only} \\
(C)\ \text{no imaginary values of }t\text{ only} \qquad
(D)\ t\equal{}0 \qquad
(E)\ t\equal{}\pm 5