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x^4+2x^3+x^2-4因式分解(急需)(x^4+2x^3-9x^2-2x+8因式分解)

x^4+2x^3+x^2-4因式分解(急需)(x^4+2x^3-9x^2-2x+8因式分解)

x^4+2x^3-9x^2-2x+8因式分解

原式

=(x^4-9x^2+8)+(2x^3-2x)

=(x^2-1)(x^2-8)+2(x^2-1)

=(x^2-1)(x^2+2x-8)

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

x^4+x^3+x^2+2因式分解

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x^4+x^3+x^2+2

=(x^4+2x^2+1)-x^2+(x^3+1)

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

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

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

x^4+x^3+x^2+2

=(x^4-x^3+x^2)+2(x^3+1)

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

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

x^4+x^3+x^2+2

=(x^4+x)+(x^3+1)+(x^2-x+1)

=(x+1)(x^3+1)+(x^2-x+1)

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

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

因式分解:x的四次方-3x²-4

x∧4-3x²-4

=(x²-4)(x²+1)

=(x+2)(x-2)(x²+1)

X的四次幂+4 因式分解

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(X^4)+4

=(X^4)+4X²+4-4X²

=(X²+2)²-(2X)²

=(X²+2+2X)(X²+2-2X)