已知a²-14a=-49,求(a²+4-4a)除以(a-2)·(a+2)+5的值已知a²-14a=-49,求(a²+4-4a)÷(a-2)·(a+2)+5的值
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![已知a²-14a=-49,求(a²+4-4a)除以(a-2)·(a+2)+5的值已知a²-14a=-49,求(a²+4-4a)÷(a-2)·(a+2)+5的值](/uploads/image/z/15121110-30-0.jpg?t=%E5%B7%B2%E7%9F%A5a%26%23178%3B-14a%3D-49%2C%E6%B1%82%EF%BC%88a%26%23178%3B%2B4-4a%EF%BC%89%E9%99%A4%E4%BB%A5%EF%BC%88a-2%EF%BC%89%C2%B7%EF%BC%88a%2B2%EF%BC%89%2B5%E7%9A%84%E5%80%BC%E5%B7%B2%E7%9F%A5a%26%23178%3B-14a%3D-49%EF%BC%8C%E6%B1%82%EF%BC%88a%26%23178%3B%2B4-4a%EF%BC%89%C3%B7%EF%BC%88a-2%EF%BC%89%C2%B7%EF%BC%88a%2B2%EF%BC%89%2B5%E7%9A%84%E5%80%BC)
已知a²-14a=-49,求(a²+4-4a)除以(a-2)·(a+2)+5的值已知a²-14a=-49,求(a²+4-4a)÷(a-2)·(a+2)+5的值
已知a²-14a=-49,求(a²+4-4a)除以(a-2)·(a+2)+5的值
已知a²-14a=-49,求(a²+4-4a)÷(a-2)·(a+2)+5的值
已知a²-14a=-49,求(a²+4-4a)除以(a-2)·(a+2)+5的值已知a²-14a=-49,求(a²+4-4a)÷(a-2)·(a+2)+5的值
a²-14a=-49
a²-14a+49=0
(a-7)²=0
a=7
(a²+4-4a)除以(a-2)·(a+2)+5
=(a-2)²÷[(a+2)(a-2)]+5
=(a-2)/(a+2)+5
=(7-2)/(7+2)+5
=5/9+5
=50/9
a=7,后面的你自己算吧,不太明白你后面个式子的意思。
a²-14a=-49
a²-14a+49=0
(a-7)²=0
∴a=7
(a²+4-4a)除以(a-2)·(a+2)+5
=(a-2)²/(a-2)·(a+2)+5
=(a-2)/(a+2)+5
=5/9+5
=50/9
∵a²-14a=-49
∴(a-7)²=0
∴a=7
(a²+4-4a)除以(a-2)·(a+2)+5
=(a-2)²/(a-2)×(a+2)+5
=(a-2)(a+2)+5
=a²-4+5
=a²+1
=49+1
=50
a²-14a=-49
a²-14a+49=0
(a-7)²=0
a=7
(a²+4-4a)除以(a-2)·(a+2)+5
=(a-2)²÷[(a+2)(a-2)]+5
=(a-2)/(a+2)+5
=(7-2)/(7+2)+5
=5/9+5
=50/9