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ACCUPLACER
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Add and Subtract with Unlike Denominators
Grade Level
ACCUPLACER
AAF.103 Add and Subtract with Unlike Denominators
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🔴 Hard
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Which option correctly identifies the LCD and simplified result for 3/(x
2
- 49) - 3/(x
2
- 2x - 35) - (-x + 4)/(x
2
+ 12x + 35)? Assume excluded values are not used.
A
LCD = (x - 7)(x + 5)(x + 7); simplified result = (-x
2
+ 17x + 8)/((x - 7)(x + 5)(x + 7))
B
LCD = (x - 7)
2
(x + 5)
2
(x + 7)
2
; simplified result = (x
2
- 11x + 22)/((x - 7)(x + 5)(x + 7))
C
LCD = (x - 7)(x + 5)(x + 7); simplified result = (x
2
- 11x + 22)/((x - 7)(x + 5)(x + 7))
D
LCD = (x - 7)(x + 7); simplified result = (x - 4)/((x - 7)(x + 5)(x + 7))
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