(a+b)² -(a²+b²)的结果,用a,b表示例: (1+2)²=9 , 1²+2²=5 (2+3)²=25 , 2²+3²=13 (3+4)²=49 , 3²+4²=25 (1)试判断两个正有
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![(a+b)² -(a²+b²)的结果,用a,b表示例: (1+2)²=9 , 1²+2²=5 (2+3)²=25 , 2²+3²=13 (3+4)²=49 , 3²+4²=25 (1)试判断两个正有](/uploads/image/z/13327767-63-7.jpg?t=%EF%BC%88a%2Bb%EF%BC%89%26%23178%3B+-%EF%BC%88a%26%23178%3B%2Bb%26%23178%3B%EF%BC%89%E7%9A%84%E7%BB%93%E6%9E%9C%2C%E7%94%A8a%2Cb%E8%A1%A8%E7%A4%BA%E4%BE%8B%EF%BC%9A+%EF%BC%881%2B2%EF%BC%89%26%23178%3B%3D9+++%2C++++++1%26%23178%3B%2B2%26%23178%3B%3D5+++++++++%EF%BC%882%2B3%EF%BC%89%26%23178%3B%3D25+%2C+++2%26%23178%3B%2B3%26%23178%3B%3D13+++++++++%EF%BC%883%2B4%EF%BC%89%26%23178%3B%3D49+%2C+++3%26%23178%3B%2B4%26%23178%3B%3D25++++++++++%EF%BC%881%EF%BC%89%E8%AF%95%E5%88%A4%E6%96%AD%E4%B8%A4%E4%B8%AA%E6%AD%A3%E6%9C%89)
(a+b)² -(a²+b²)的结果,用a,b表示例: (1+2)²=9 , 1²+2²=5 (2+3)²=25 , 2²+3²=13 (3+4)²=49 , 3²+4²=25 (1)试判断两个正有
(a+b)² -(a²+b²)的结果,用a,b表示
例: (1+2)²=9 , 1²+2²=5
(2+3)²=25 , 2²+3²=13
(3+4)²=49 , 3²+4²=25
(1)试判断两个正有理数(a+b)² 与 a²+b²的关系
(2)根据下图猜想(a+b)² - a²+b²的结果(用a,b表示)
大概就是这样……左上和右下的图是正方形
(a+b)² -(a²+b²)的结果,用a,b表示例: (1+2)²=9 , 1²+2²=5 (2+3)²=25 , 2²+3²=13 (3+4)²=49 , 3²+4²=25 (1)试判断两个正有
(1)2*(a^2+b^2)>=(a+b)^2>=a^2+b^2.
(2)2ab