Question

Find product of (3x/4 + 4y/3) and (3x/4-4y/3)
​

Answer 1

Answer:

simplify: (3x+4y)

3

−(3x−4y)

3

−216x

2

y

We know: (a+b)

3

=a

3

+b

3

+3a

2

b+3ab

2

And (a−b)

3

=a

3

−b

3

−3a

2

b+3ab

2

So,

⇒27x

3

+64y

3

+108x

2

y+144xy

2

−(27x

3

−64y

3

−108x

2

y+144xy

2

)−216x

2

y

⇒128y

3

+216x

2

y−216x

2

y

⇒128y

3

Answer.