(a-b)(5x-3y)-(b-a)(3x+5y)
问题描述:
(a-b)(5x-3y)-(b-a)(3x+5y)
答
(a-b)(5x-3y)-(b-a)(3x+5y)
=(a-b)(5x-3y)+(a-b)(3x+5y)
=(a-b)(5x-3y+3x+5y)
=2(a-b)(4x+y)