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因式分解16(x-1)²-(x+2)²(x+2)(x+3)+x²-4(a²+ab+b)²-9a²b²...
因式分解 16(x-1)²-(x+2)² (x+2)(x+3)+x²-4 (a²+ab+b)²-9a²b² (x+y)(x+y-4)+4
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16(x-1)²-(x+2)²
=(4x-4+x+2)(4x-4-x-2)
=(5x-2)(3x-6)
=3(5x-2)(x-2)
(x+2)(x+3)+x²-4
=(x+2)(x+3)+(x+2)(x-2)
=(x+2)(x+3+x-2)
=(x+2)(2x+1)
(a²+ab+b)²-9a²b²
=(a²+ab+b-3ab)(a²+ab+b+3ab)
=(a²-2ab+b)(a²+4ab+b)
(x+y)(x+y-4)+4
=(x+y)²-4(x+y)+4
=(x+y-2)²
=(4x-4+x+2)(4x-4-x-2)
=(5x-2)(3x-6)
=3(5x-2)(x-2)
(x+2)(x+3)+x²-4
=(x+2)(x+3)+(x+2)(x-2)
=(x+2)(x+3+x-2)
=(x+2)(2x+1)
(a²+ab+b)²-9a²b²
=(a²+ab+b-3ab)(a²+ab+b+3ab)
=(a²-2ab+b)(a²+4ab+b)
(x+y)(x+y-4)+4
=(x+y)²-4(x+y)+4
=(x+y-2)²
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16(x-1)²-(x+2)²
=(4x-4+x+2)(4x-4-x-2)
=(5x-2)(3x-6)
=3(5x-2)(x-2)
(x+2)(x+3)+x²-4
=(x+2)(x+3)+(x+2)(x-2)
=(x+2)(x+3+x-2)
=(x+2)(2x+1)
(a²+ab+b)²-9a²b²
=(a²+ab+b-3ab)(a²+ab+b+3ab)
=(a²-2ab+b)(a²+4ab+b)
很简单
(x+y)(x+y-4)+4
=(x+y)²-4(x+y)+4
=(x+y-2)²
=(4x-4+x+2)(4x-4-x-2)
=(5x-2)(3x-6)
=3(5x-2)(x-2)
(x+2)(x+3)+x²-4
=(x+2)(x+3)+(x+2)(x-2)
=(x+2)(x+3+x-2)
=(x+2)(2x+1)
(a²+ab+b)²-9a²b²
=(a²+ab+b-3ab)(a²+ab+b+3ab)
=(a²-2ab+b)(a²+4ab+b)
很简单
(x+y)(x+y-4)+4
=(x+y)²-4(x+y)+4
=(x+y-2)²
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看不明白,太乱了。
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(16x-16)平方-x平方-4
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