text: help with algebra problem??? can you help me with question number 4 from this site:  http://act.org/compass/sample/algebra.html factor the numerator and the denominator out: r^2 -5r + 6 = (r - 3)(r - 2) r^2 - 4 = (r + 2)(r - 2) (a^2 - b^2 can always be factored to (a + b)(a - b)  cross out the (r - 2)'s, and you have (r - 3)/(r + 2), or answer choice a.