①a²+a+1/4②(y²-6)²-6(y²-6)+9过程!
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①a²+a+1/4②(y²-6)²-6(y²-6)+9过程!
![①a²+a+1/4②(y²-6)²-6(y²-6)+9过程!](/uploads/image/z/16964463-39-3.jpg?t=%E2%91%A0a%26%23178%3B%2Ba%2B1%2F4%E2%91%A1%EF%BC%88y%26%23178%3B-6%EF%BC%89%26%23178%3B-6%EF%BC%88y%26%23178%3B-6%EF%BC%89%2B9%E8%BF%87%E7%A8%8B%21)
答:
①a²+a+1/4
=a²+2*a*(1/2)+(1/2)²
=(a+1/2)²
②(y²-6)²-6(y²-6)+9
=(y²-6-3)²
=(y²-9)²
=(y-3)²(y+3)²
①a²+a+1/4
=a²+2*a*(1/2)+(1/2)²
=(a+1/2)²
②(y²-6)²-6(y²-6)+9
=(y²-6-3)²
=(y²-9)²
=(y-3)²(y+3)²
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