x^4+4 factorise . it equals??
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x^4+4 adding and subtracting 4x^2
x^4+4x^2+4-4x^2
(x^2+2)^2- (2x)^2
(x^2+2-2x)(x^2+2+2x)
plz mark it as brianliest answer
x^4+4x^2+4-4x^2
(x^2+2)^2- (2x)^2
(x^2+2-2x)(x^2+2+2x)
plz mark it as brianliest answer
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