因式分解:X的4次方加4等于多少无

问题描述:

因式分解:X的4次方加4等于多少

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

X^4+4
=X^4+4X^2+4-4X^2
=(X2+2)^2-(2X)^2
=(X^2-2X+2)(X^2+2X+2)

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

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