The expression 16x4−81y4 is NOT evenly divisible by
A
2x−3y
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B
2x+3y
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C
4x−9y
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D
4x2+9y2
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Solution
The correct option is D4x−9y Here, first check the option for the equation 16x4−81y4 ⇒(4x2)2−(9y2)2 a2−b2=(a+b)(a−b) ⇒(4x2+9y2)(4x2−9y2) ⇒2x−3y,2x+3y,4x2+9y2 are the factors of 16x4−81y4 So, 4x−9y is not evenly divisible.