Change in the Value of an Expression
Source:
June 13, 2009
Problem Statement
If, in the expression x^2 \minus{} 3, increases or decreases by a positive amount of , the expression changes by an amount:
(A)\ {\pm 2ax \plus{} a^2}\qquad
(B)\ {2ax \pm a^2}\qquad
(C)\ {\pm a^2 \minus{} 3} \qquad
(D)\ {(x \plus{} a)^2 \minus{} 3}\qquad\\
(E)\ {(x \minus{} a)^2 \minus{} 3}