EXERCISES 1 Directions: Which of the following is true? Explain. (Assume that all denominators * 0.)

1. The expression (a-1ab+2)/a+2=-1ab.


2. Both numerator and denominator of the expression 4m²-20mn+25n²/m²+6mn-9n² are perfect square trinomials.

3. a²+6a+9/a²-9 = (a+3)(a+3)/(a+3)(a-3) = a+3/a-3.
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