Question

If 3x -2y =5 and =6 , find the value of 27x³ - 8y³​

Answer 1

(8/27)x

3

−(1/8)y

3

Above terms can be written as,

((2/3x)

3

−(1/2y)

3

We know that, a

3

−b

3

=(a−b)(a

2

+ab+b

2

)

((2/3)x−1/2y)[(2/3)x+(2/3)x(1/2)y+((1/2)y)

2

]

((2/3)x−(1/2)y)[(4/9)x

2

+(xy/3)+(y

2

/4)]

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