Question

简单的数学题 写了步骤+20分

因式分解 x^3-5x^2+6x （2）4m^3+m-1
多项式4-x^2-2xy-y^2分解因式的结果是 这题只写结果

Answer 1

x^3-5x^2+6x
=x(x^2-5x+6)
=x(x-2)(x-3)

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

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

Answer 2

x^3-5x^2+6x
=x(x^2-5x+6)
=x(x-2)(x-3)

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

4-x^2-2xy-y^2
=4-(x+y)^2
=(2+x+y)(2-x-y)
看明白了吗

Answer 3

x^3-5x^2+6x
=x(x²-5x+6)
=x(x-2)(x-3)

4m^3+m-1
=4m³-2m²+2m²+m-1
=2m²(2m-1)+(2m-1)(m+1)
=(2m-1)(2m²+m+1)

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

Answer 4

Not simple , too difficult !