Question

81 x ki power 4 - y ki power 4​

Answer 1

Answer:

We can further write it as

 81x4−y4=(9x2)2−(y2)2

Based on the equation a2−b2=(a+b)(a−b)

We get,

 81x4−y4=(9x2+y2)(9x2−y2)

On further simplification using the formula

 81x4−y4=(9x2+y2)((3x2)2−y2)

So we get,

 81x4−y4=(9x2+y2)(3x+y)(3x−y)

Hope it helps