5a+b+3c)(5a+b-3c)=A2-B2,则A=_______B=______.
问题描述:
5a+b+3c)(5a+b-3c)=A2-B2,则A=_______B=______.
答
A=5a+b
B=3c
5a+b+3c)(5a+b-3c)=A2-B2,则A=_______B=______.
A=5a+b
B=3c