因式分解 化简求值5x(m-2)-4x(m-2)x=0.4,m=5.5

问题描述:

因式分解 化简求值
5x(m-2)-4x(m-2)
x=0.4,m=5.5

5x(m-2)-4x(m-2)
=(5x-4x)(m-2)
=x(m-2)
=0.4×3.5=1.4

=x(m-2)(5-4)
=0.4*(5.5-2)
=1.4