因式分解:2x²-4x+2 x²-3x-28 a^3+a²-a-1求求各位大侠了,2x²-4x+2 x²-3x-28 a^3+a²-a-1
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![因式分解:2x²-4x+2 x²-3x-28 a^3+a²-a-1求求各位大侠了,2x²-4x+2 x²-3x-28 a^3+a²-a-1](/uploads/image/z/264272-32-2.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%EF%BC%9A2x%26%23178%3B-4x%2B2+x%26%23178%3B-3x-28+a%5E3%2Ba%26%23178%3B-a-1%E6%B1%82%E6%B1%82%E5%90%84%E4%BD%8D%E5%A4%A7%E4%BE%A0%E4%BA%86%EF%BC%8C2x%26%23178%3B-4x%2B2+x%26%23178%3B-3x-28+a%5E3%2Ba%26%23178%3B-a-1)
因式分解:2x²-4x+2 x²-3x-28 a^3+a²-a-1求求各位大侠了,2x²-4x+2 x²-3x-28 a^3+a²-a-1
因式分解:2x²-4x+2 x²-3x-28 a^3+a²-a-1
求求各位大侠了,
2x²-4x+2 x²-3x-28 a^3+a²-a-1
因式分解:2x²-4x+2 x²-3x-28 a^3+a²-a-1求求各位大侠了,2x²-4x+2 x²-3x-28 a^3+a²-a-1
2x²-4x+2
=2(x²-2x+1)
=2(x-1)²
x²-3x-28
=(x-7)(x+4)
a^3+a²-a-1
=(a^3+a²)-(a+1)
=a²(a+1)-(a+1)
=(a+1)(a²-1)
=(a+1)²(a-1)