Question

x^2+y^2-2xy-4z^2 factorise​

Answer 1

Answer:

(x+y)^2+2(xy-2z^2) this is the answer

Answer 2

The first three terms of the expression is in the form (x+y)

2

and the fourth term is a perfect square.

Hence, x

2

+2xy+y

2

−4z

2

=(x+y)

2

−(2z)

2

=[(x+y)+2z][(x+y)−2z]

=(x+y+2z)(x+y−2z)

Step-by-step explanation:

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