Question

x-2y-x^2+4y^2 factorise it
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Answer 1

x - 2y - (x ^ 2 - 4 Y ^2 )

= ( x - 2 y) - ( x - 2y ) ( x + 2y)

= [ x - 2y ] ( 1 - x+ 2y ) Ans.

Answer 2

this is the required factorisation