(3x+5y)²-(5x-3y)²

分类: 作业答案 • 2023-01-09 04:45:53

问题描述：

(3x+5y)²-(5x-3y)²

答

(3x+5y)²-(5x-3y)²
=[(3x+5y)+(5x-3y)][(3x+5y)-(5x-3y)]
=(8x+2y)(-2x+8y)
=-8(4x+y)(x-4y)