16-a^2/a^2+80+16 ÷a-4/2a+8*a-2/a+2
发布网友
发布时间:2024-10-03 07:34
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热心网友
时间:2024-10-19 10:30
(16 - a^2)/(a^2 + 8a + 16) ÷ ( a - 4)/(2a + 8) ×(a - 2)/( a + 2)
= (4 - a)(a + 4)/(a + 4)^2 × 2(a + 4)/(a - 4) × (a - 2)/(a + 2)
= -(a - 4)/(a + 4) × 2(a + 4)/(a - 4) × ( a - 2)/(a + 2)
= -2 × (a - 2)/( a + 2)
= -2(a - 2)/(a + 2)
热心网友
时间:2024-10-19 10:29
拍照吧,这样会理解错的