帮我看看这道数学题写对了没化简:(a*a-b*b)/ab - (ab-b*b)/(ab-a*a) + a/b原式=(a+b)(a-b)/ab - b(a-b)/a(b-a) + a/b=(a+b)(a-b)(b-a)/ab(b-a) - b*b(a-b)/ab(b-a) + a*a(b-a)/ab(b-a)=(a+b)(a-b)(b-a) - b*b(a-b) + a*a(b-a)/ab(b-a)=(a+b)(a-b)(
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/15 01:52:44
![帮我看看这道数学题写对了没化简:(a*a-b*b)/ab - (ab-b*b)/(ab-a*a) + a/b原式=(a+b)(a-b)/ab - b(a-b)/a(b-a) + a/b=(a+b)(a-b)(b-a)/ab(b-a) - b*b(a-b)/ab(b-a) + a*a(b-a)/ab(b-a)=(a+b)(a-b)(b-a) - b*b(a-b) + a*a(b-a)/ab(b-a)=(a+b)(a-b)(](/uploads/image/z/3178973-29-3.jpg?t=%E5%B8%AE%E6%88%91%E7%9C%8B%E7%9C%8B%E8%BF%99%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%E5%86%99%E5%AF%B9%E4%BA%86%E6%B2%A1%E5%8C%96%E7%AE%80%EF%BC%9A%28a%2Aa-b%2Ab%29%2Fab+-+%28ab-b%2Ab%29%2F%28ab-a%2Aa%29+%2B+a%2Fb%E5%8E%9F%E5%BC%8F%3D%EF%BC%88a%2Bb%29%28a-b%29%2Fab+-+b%28a-b%29%2Fa%28b-a%29+%2B+a%2Fb%3D%28a%2Bb%29%28a-b%29%28b-a%29%2Fab%28b-a%29+-+b%2Ab%28a-b%29%2Fab%28b-a%29+%2B+a%2Aa%28b-a%29%2Fab%28b-a%29%3D%28a%2Bb%29%28a-b%29%28b-a%29+-+b%2Ab%28a-b%29+%2B+a%2Aa%28b-a%29%2Fab%28b-a%29%3D%28a%2Bb%29%28a-b%29%28)
帮我看看这道数学题写对了没化简:(a*a-b*b)/ab - (ab-b*b)/(ab-a*a) + a/b原式=(a+b)(a-b)/ab - b(a-b)/a(b-a) + a/b=(a+b)(a-b)(b-a)/ab(b-a) - b*b(a-b)/ab(b-a) + a*a(b-a)/ab(b-a)=(a+b)(a-b)(b-a) - b*b(a-b) + a*a(b-a)/ab(b-a)=(a+b)(a-b)(
帮我看看这道数学题写对了没
化简:(a*a-b*b)/ab - (ab-b*b)/(ab-a*a) + a/b
原式=(a+b)(a-b)/ab - b(a-b)/a(b-a) + a/b
=(a+b)(a-b)(b-a)/ab(b-a) - b*b(a-b)/ab(b-a) + a*a(b-a)/ab(b-a)
=(a+b)(a-b)(b-a) - b*b(a-b) + a*a(b-a)/ab(b-a)
=(a+b)(a-b)(b-a) - b*b(a-b) - a*a(a-b)/ab(b-a)
=(a-b)(b*b-a*a-b*b-a*a)/ab(b-a)
= -2a*a(a-b)/ab(b-a)
= -2a*a(a-b)/ -ab(a-b)
= 2a/b
注:a*a 和 b*b 是a的平方和b的平方(因为打不出...) “/” =分数线
帮我看看这道数学题写对了没化简:(a*a-b*b)/ab - (ab-b*b)/(ab-a*a) + a/b原式=(a+b)(a-b)/ab - b(a-b)/a(b-a) + a/b=(a+b)(a-b)(b-a)/ab(b-a) - b*b(a-b)/ab(b-a) + a*a(b-a)/ab(b-a)=(a+b)(a-b)(b-a) - b*b(a-b) + a*a(b-a)/ab(b-a)=(a+b)(a-b)(
完全正确