(a^2-16)/(a^2+8a+16)÷(1-4/a)
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(a^2-16)/(a^2+8a+16)÷(1-4/a)(a^2-16)/(a^2+8a+16)÷(1-4/a)(a^2-16)/(a^2+8a+16)÷(1-4/a)(a²-16)/(a&
(a^2-16)/(a^2+8a+16)÷(1-4/a)
(a^2-16)/(a^2+8a+16)÷(1-4/a)
(a^2-16)/(a^2+8a+16)÷(1-4/a)
(a²-16)/(a²+8a+16)÷[1-(4/a)]
=(a+4)(a-4)/(a+4)²÷(a-4)/a
=(a-4)/(a+4)×a/(a-4)
=a/(a+4)
答:
此题考的是因式分解
主要难点是:
1-4/a=(a-4)/a
除以一个数,等于乘上这个数的倒数
(a²-16)/(a²+8a+16)÷[1-(4/a)]
=(a+4)(a-4)/(a+4)²÷(a-4)/a
=(a-4)/(a+4)×a/(a-4)
=a/(a+4)
分式的乘除:16-a平方/a平方+8a+16÷a-4/2a+8乘a-2/a+281-a平方/a平方+6a+9÷a-9/2a+6乘a+3/a+9
16-a^2/a^2+8a+16÷a-4/2a+8×a-2/a+2
16-a^2/a^2+8a+16 除以 a-4/2a+8 乘以 a-2/a+2
计算16-a²/a²+8a+16÷a-4/2a+8×a-2/a+2
16-a² /a²+8a+16÷a-4/2a+8×a-2/a+2
a²-16/a²+2a-8÷(a-2)·a²+4-4a/a-2
(1-16a×a×a×a)÷(4a×a+1)÷(2a+1)²
(1-16a×a×a×a)÷(4a×a+1)÷(2a+1)
计算16-a² /a²+8a+16÷a-4/2a+8
(a+1/a)(a^2+1/a^2)(a^4+1/a^4)(a^8+1/a^8)(a^16+1/a^16)(a^32+1/a^32)(a^2-1)
((a-2)/(a+4))×((a²+8a+16)/4a²)
a^2-16/a^2-8a+16化简
16-8a-【2a-9-(3-6a)】
(4a+1)( )=16a^2+8a+1
因式分解(a+4a)2+8(a2+4a)+16
计算:(a^2-8a+16)/(9-a^2 ) ÷(16-a^2)/(9+6a+a^2 )
a^2-8a+16/9-a^2÷16-a^2/9+6a+a^2
因式分解8(a^2+1)-16a