Question

factorise:343y^3-1000

Answer 1

Answer:

hey guys

hey guys here is your answer

Step-by-step explanation:

343y

3

−1000 = (7y)

3

−(10)

3

We know that x

3

−y

3

=(x−y)(x

2

+xy+y

2

)

Comparing both sides, then we have

x=7y and y=10

Therefore, value of (7y)

3

−(10)

3

is

=(7y−10)[(7y)

2

+(7y)(10)+(10)

2

]

= (7y−10)(49y

2

+70y+100)

Answer 2

Answer:

change 1000 into its cube which is 10 and then use the identity (a-b)^3

and you will get your answer