把下列各式分解因式x四次方-16,a²-3a-ab+3b,y²-x²+6x-9
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![把下列各式分解因式x四次方-16,a²-3a-ab+3b,y²-x²+6x-9](/uploads/image/z/1088565-69-5.jpg?t=%E6%8A%8A%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8Fx%E5%9B%9B%E6%AC%A1%E6%96%B9-16%2Ca%26%23178%3B-3a-ab%2B3b%2Cy%26%23178%3B-x%26%23178%3B%2B6x-9)
把下列各式分解因式x四次方-16,a²-3a-ab+3b,y²-x²+6x-9
把下列各式分解因式x四次方-16,a²-3a-ab+3b,y²-x²+6x-9
把下列各式分解因式x四次方-16,a²-3a-ab+3b,y²-x²+6x-9
x四次方-16,
=(x²+4)(x²-4)
=(x²+4)(x+2)(x-2)
a²-3a-ab+3b
=a(a-3)-b(a-3)
=(a-3)(a-b)
,y²-x²+6x-9
=y²-(x-3)²
=(y-x+3)(y+x-3)