Question

Factorise: 27x^4-8x​

Answer 1

Answer:

Theory : A difference of two perfect cubes, a3 - b3 can be factored into

(a-b) • (a2 +ab +b2)

Proof : (a-b)•(a2+ab+b2) =

a3+a2b+ab2-ba2-b2a-b3 =

a3+(a2b-ba2)+(ab2-b2a)-b3 =

a3+0+0+b3 =

a3+b3

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Answer 2

Answer:

2/3

Step-by-step explanation:

27x^4-8x

x(27x^3-8)=0

27x^3=8

x^3=8/27

x=2/3