Question

Factorise :- (Class 8) it's urgent please

a⁴- (a - 4)⁴​

Answer 1

this the answer

the cubic equation can't be done

so we use hit and trial method

Answer 2

Answer:

-8(a - 1)(a² - 2a +2)

Step-by-step explanation:

a⁴- (a - 4)⁴​

=(a²)² - {(a - 2)²}²

={a² + (a - 2)²}{a² - (a - 2)²}

= (a² + a² - 4a + 4)(a + a - 2)(a - a - 2)

= (2a² - 4a + 4)(2a - 2)(-2)

= 2(a² - 2a +2)2(a - 1)(-2)

= -8(a - 1)(a² - 2a +2)

Ans:-  -8(a - 1)(a² - 2a +2)