Question

What is the simplified form of X^2-25/X+5
a. x - 5, with the restriction x ≠ -5
b. x + 5, with the restriction x ≠ 5
c. x - 5, with the restriction x ≠ 5
d. x + 5, with the restriction x ≠ -5
How do I find restrictions?

Answer 1

Memorize \[ a^2 - b^2 = (a + b) (a - b) \]

\[(x^2-25) /( x - 5) \]

\[= ( x+ 5) ( x - 5))/( x - 5) \]

cancel common terms

\[= ( x+ 5) \]