4x^4+1=?

熱心網友

4x^4+1=4x^4+4x^2 +1 -4x^2 = (2x^2+1)^2 -(2x)^2 = (2x^2+2x+1)(2x^2-2x+1)

熱心網友

4x^4+1=(2x^2)^2+1+2(2x^2)-2(2x^2)=(2x^2+1)^2-4x^2=(2x^2+1)^2-(2x)^2=(2x^2+2x+1)(2x^2-2x+1)

熱心網友

4x^4+1=4x^4+4x^2 +1 -4x^2 = (2x^2+1)^2 -(2x)^2 = (2x^2+2x+1)(2x^2-2x+1)

熱心網友

4x^4+1=4x^4+4x^2+1-4x^2=(2x^2+1)^2-4x^2=(2x^2+2x+1)(2x^2-2x+1)

熱心網友

4x^4+1=4x^4+4x^2+1-4x^2=(2x^2+1)^2-4x^2=(2x^2+2x+1)(2x^2-2x+1)

熱心網友

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