tolong jawabin.. susah.. tolong caranya juga ya.. 1. x4-16 ...

identitas :
a²-b² = (a-b)(a+b)

1. x⁴ - 16
= (x²-4)(x²+4)

2. 16x⁴ - y⁴
= (4x²-y²)(4x²+y²)

3. x^8 - y^8
= (x⁴-y⁴)(x⁴+y⁴)

4. x^8 - 1
= (x⁴-1)(x⁴+1)

1. x^4 - 16 = (x^2 -4)(x^2 + 4)
2. 16 x^4 - y^4 = (4x^2 - y^2)(4x^2 + y^2)
3. x^8 - y^8 = (x^4 - y^4) (x^4 + y^4)
4. x^8 - 1 = (x^4 - 1) (x^4 + 1)