将下列多项式分解因式
(1)x²+12x+36(2)a²b²-6ab+9(3)-4x²-12x-9(4)4/9a²-2ab+9/4b²...
(1)x²+12x+36 (2)a²b²-6ab+9 (3)-4x²-12x-9 (4)4/9a²-2ab+9/4b² (5)(a+b)²+2(a+b)c+c² (6)4a(a-b)+b² (7)4xy²-4x²y-y³ (8)(4a²+1)²-16a²
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(1)x²+12x+36
=(x+6)²
(2)a²b²-6ab+9
=(ab-3)²
(3)-4x²-12x-9
=-(2x+3)²
(4)4/9a²-2ab+9/4b²
=(2/3a-3/2b)²
(5)(a+b)²+2(a+b)c+c²
=(a+b+c)²
(6)4a(a-b)+b²
=4a²-4ab+b²
=(2a-b)²
(7)4xy²-4x²y-y³
=-y(y²-4xy+4x²)
=-y(2x-y)²
(8)(4a²+1)²-16a²
=(4a²+1+4a)(4a²+1-4a)
=(2a+1)²(2a-1)²
=(x+6)²
(2)a²b²-6ab+9
=(ab-3)²
(3)-4x²-12x-9
=-(2x+3)²
(4)4/9a²-2ab+9/4b²
=(2/3a-3/2b)²
(5)(a+b)²+2(a+b)c+c²
=(a+b+c)²
(6)4a(a-b)+b²
=4a²-4ab+b²
=(2a-b)²
(7)4xy²-4x²y-y³
=-y(y²-4xy+4x²)
=-y(2x-y)²
(8)(4a²+1)²-16a²
=(4a²+1+4a)(4a²+1-4a)
=(2a+1)²(2a-1)²
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