Question

Factorise the following using identities: 4x^ 2- x ^2+4xy-4y^2​

Answer 1

Answer:

4x

2

−

25

y

2

=(2x)

2

−(

5

y

)

2

We know that appropriate identities x

2

−y

2

=(x−y)(x+y)

Here x=2x and y=

5

y

(2x)

2

−(

5

y

)

2

=(2x−

5

y

)(2x+

5

y

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Answer 2

Answer:

if 2y-1=5, then value of 5y+3 is