4x²-(x-y)² 因式分解,希望还有人回答,快4x²-(x-y)² x²-(x-y)² -(a+b)²+(2a-3b)² 49(x-2)²-25(x-3)²
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/15 05:25:18
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4x²-(x-y)² 因式分解,希望还有人回答,快4x²-(x-y)² x²-(x-y)² -(a+b)²+(2a-3b)² 49(x-2)²-25(x-3)²
4x²-(x-y)² 因式分解,希望还有人回答,快
4x²-(x-y)² x²-(x-y)² -(a+b)²+(2a-3b)² 49(x-2)²-25(x-3)²
4x²-(x-y)² 因式分解,希望还有人回答,快4x²-(x-y)² x²-(x-y)² -(a+b)²+(2a-3b)² 49(x-2)²-25(x-3)²
4x²-(x-y)²
=(2x+x-y)(2x-x+y)
=(3x-y)(x+y)
x²-(x-y)²
=(x+x-y)(x-x+y)
=y(2x-y)
-(a+b)²+(2a-3b)²
=(2a-3b+a+b)(2a-3b-a-b)
=(3a-2b)(a-4b)
49(x-2)²-25(x-3)²
=(7x-14+5x-15)(7x-14-5x+15)
=(12x-29)(2x+1)