factorise the following expression
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Step-by-step explanation:
4x^2 + 2 y^2. + x^2 y^2. +8
4x^2 + 8 + x^2y^2 +2y^2
4(x^2 +2)+ y^2( x^2 + 2)
(x^2 +2) (4+y^2)
thanks
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