Question

9. Obtain product of xy,2x? y,2xy​

Answer 1

Answer:

As we know the formula (a+b)(a+b)= a

2

+b

2

Similarly (a−b)(a+b)=a

2

−b

2

So (2x−y)(2x+y) =(2x)

2

−(y)

2

= 4x

2

−y

2

So = (4x

2

−y

2

)(4x

2

−y

2

)

= (4x

2

)

2

−(y

2

)

2

= 16x

4

−y

4