Answers: 1
. Reason is becasue you simplify it, making it 
. Then x^2 - 4 would be the step, "apply difference of two squares formula," giving us (x+2)(x-2). Now we cancel the common factor, which is x + 2, giving us the answer that I gave you in the first sentence, 
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Simplify the following fraction: [tex]\frac{(x+2)^2+3(x+2)^2}{x^2-4} [/tex]...
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