Q. Simplifyย 81x2ย -ย 49y29xย +ย 7y
A) 9x-7y
B) 9x++7y
C) 7y
D) 9x
โ Correct Answer: 9x-7y
Exam Insight
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A) 9x-7y
B) 9x++7y
C) 7y
D) 9x
โ Correct Answer: 9x-7y
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