用配方法解下列方程a²+b²+2a-4b+5=(a+____)²+(b-______)²
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![用配方法解下列方程a²+b²+2a-4b+5=(a+____)²+(b-______)²](/uploads/image/z/2492086-22-6.jpg?t=%E7%94%A8%E9%85%8D%E6%96%B9%E6%B3%95%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8Ba%26%23178%3B%2Bb%26%23178%3B%2B2a-4b%2B5%3D%EF%BC%88a%2B____%EF%BC%89%26%23178%3B%2B%EF%BC%88b-______%EF%BC%89%26%23178%3B)
用配方法解下列方程a²+b²+2a-4b+5=(a+____)²+(b-______)²
用配方法解下列方程a²+b²+2a-4b+5=(a+____)²+(b-______)²
用配方法解下列方程a²+b²+2a-4b+5=(a+____)²+(b-______)²
a²+b²+2a-4b+5
=(a²+2a+1)+(b²-4b+4)
=(a+1)²+(b-2)²