Question

a⁴-b⁴ write down in a²-b² formula (a²)²-(b²)² and factorise this ?
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Answer 1

Answer:

well I hope is it's useful

Step-by-step explanation:

can we write a^4 as (a^2)^2.. similarly b^4 as (b^2)^2.. now if you know x^2 - y^2 is (x-y)(x+y) … replace x by a^2 and replace y by b^2

(a^2-b^2)(a^2+b^2)

now (a^2-b^2) can also be written as (a-b)(a+b)… so