求化简 y=(x-5)(100-7(x-7))帮帮忙啦
问题描述:
求化简 y=(x-5)(100-7(x-7))帮帮忙啦
答
y=(x-5)(100-7x+49)=(x-5)(149-7x)=149x-745-7x平方+35x=-7x平方+184x-745
求化简 y=(x-5)(100-7(x-7))帮帮忙啦
y=(x-5)(100-7x+49)=(x-5)(149-7x)=149x-745-7x平方+35x=-7x平方+184x-745