两道因式分解 数学题.要有过程 thanks.12a^3-12a^2b+3ab^2m^4-8m^2+16坐等.

问题描述:

两道因式分解 数学题.
要有过程 thanks.
12a^3-12a^2b+3ab^2
m^4-8m^2+16
坐等.

12a^3-12a^2b+3ab^2
=3a(4a^2-4ab+b^2)
=3a(2a-b)^2
m^4-8m^2+16
=(m^2)^2-2*4*m^2+4^2
=(m^2-4^2)^2
=(m+2)^2(m-2)^2

12a^3-12a^2b+3ab^2
=3a(4a^2-4ab+b^2)
=3a(2a-b)^2
m^4-8m^2+16
=(m^2-4)^2
=(m+2)^2(m-2)^2

12a^3-12a^2b+3ab^2
=3a(4a^2-4ab+b^2)
=3a(2a-b)^2
m^4-8m^2+16
=(m^2-4)^2
=(m-2)^2(m+2)^2

12a^3-12a^2b+3ab^2
=3a(4a^2-4ab+b^2)
=3a*(2a-b)^2
m^4-8m^2+16
=(m^2-4)^2
=(m-2)^2*(m+2)^2