F.3 maths factorization

個答案應該係咁:

x^6 - x^4

= (x^3)^2 - (x^2)2

= (x^3 + x^2) (x^3 - x^2)


用左identity : a^2 - b^2


希望可以幫到你 如果以後有類似既題目, 我好樂意幫你

其實兩個答案都岩 雖然唔知點解 但兩個anw expand左之後都係
x^4 - x^6 thx

x6 - x4
=x4(x2 - 1)
=x4(x + 1)(x - 1)