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OpenStudy (anonymous):
8. Simplify. x + 7 / x^2 + 4x - 21 (1 point) a. 1/ x-3 ; where x doesn't equal 3, -7 b. x-3 ; where x doesn't equal 3 c. 1/x-7 ; where x doesn't equal 7 d. x-7
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jimthompson5910 (jim_thompson5910):
Hint: x^2 + 4x - 21 factors to (x+7)(x-3)
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