25(x+y)²-9(x-y)²
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![25(x+y)²-9(x-y)²](/uploads/image/z/5078764-28-4.jpg?t=25%28x%2By%29%26%23178%3B-9%28x-y%29%26%23178%3B)
25(x+y)²-9(x-y)²
25(x+y)²-9(x-y)²
25(x+y)²-9(x-y)²
您好:
25(x+y)²-9(x-y)²
=[5(x+y)+3(x-y)][5(x+y)-3(x-y)]
=(8x+2y)(2x+8y)
=4(4x+y)(x+4y)
不明白,可以追问
如有帮助,记得采纳,谢谢
祝学习进步!
25(x+y)²-9(x-y)²
=[5(x+y)-3(x-y)][5(x+y)+3(x-y)]
=(2x+8y)(8x+2y)
=4(x+4y)(4x+y)