简算:(a-b+2c)(a+b-2c)
问题描述:
简算:(a-b+2c)(a+b-2c)
答
(a-b+2c)(a+b-2c) =(a-(b-2c))(a+(b-2c))=a^2-(b-2c)^2
简算:(a-b+2c)(a+b-2c)
(a-b+2c)(a+b-2c) =(a-(b-2c))(a+(b-2c))=a^2-(b-2c)^2