因式分解(x²+5x+6)(x²+5x-2)+16
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因式分解(x²+5x+6)(x²+5x-2)+16
因式分解(x²+5x+6)(x²+5x-2)+16
因式分解(x²+5x+6)(x²+5x-2)+16
(x²+5x+6)(x²+5x-2)+16
=(x²+5x)²+4(x²+5x)-12+16
=(x²+5x)²+4(x²+5x)+4
=(x²+5x+2)²