分解因式,m^2(n^2-1)+4mn-n^2+1 2a(a^2+a+1)+a^4+a^2+1x(x-1)(x-2)(x-3)-24 若x^2+x+1=0求x^4+x^3+6x^2+5x+5得值已知a^2+b^2=1,c^2+d^2=1,且ac+bd=0求ab+cd的值2x^2-3xy-2y^2+3x+4y-2

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分解因式,m^2(n^2-1)+4mn-n^2+1 2a(a^2+a+1)+a^4+a^2+1x(x-1)(x-2)(x-3)-24 若x^2+x+1=0求x^4+x^3+6x^2+5x+5得值已知a^2+b^2=1,c^2+d^2=1,且ac+bd=0求ab+cd的值2x^2-3xy-2y^2+3x+4y-2
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分解因式,m^2(n^2-1)+4mn-n^2+1 2a(a^2+a+1)+a^4+a^2+1x(x-1)(x-2)(x-3)-24 若x^2+x+1=0求x^4+x^3+6x^2+5x+5得值已知a^2+b^2=1,c^2+d^2=1,且ac+bd=0求ab+cd的值2x^2-3xy-2y^2+3x+4y-2
分解因式,
m^2(n^2-1)+4mn-n^2+1 2a(a^2+a+1)+a^4+a^2+1
x(x-1)(x-2)(x-3)-24 若x^2+x+1=0求x^4+x^3+6x^2+5x+5得值
已知a^2+b^2=1,c^2+d^2=1,且ac+bd=0求ab+cd的值
2x^2-3xy-2y^2+3x+4y-2

分解因式,m^2(n^2-1)+4mn-n^2+1 2a(a^2+a+1)+a^4+a^2+1x(x-1)(x-2)(x-3)-24 若x^2+x+1=0求x^4+x^3+6x^2+5x+5得值已知a^2+b^2=1,c^2+d^2=1,且ac+bd=0求ab+cd的值2x^2-3xy-2y^2+3x+4y-2
m^2(n^2-1)+4mn-n^2+1=m^2n^2-m^2-n^2+4mn+1=(mn+1)^2-(m-n)^2=(mn+1+m-n)(mn+1-m+n)