1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a
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![1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a](/uploads/image/z/2694677-5-7.jpg?t=1.%28+-2%2F2a%2B3%29+%2B+%283%2F3-2a%29%2B%5B+2a%2B15%2F+%282a-3%29%282a%2B3%29%5D2.%5B%28a%2B2a%5E2-2a%29+-+%28a-1%2Fa%5E2-4a%2B4%29%5D+%C3%B7+4-a%2Fa)
1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a
1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]
2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a
1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a
http://i159.photobucket.com/albums/t145/l421013/MATH2/t69.png
1、
( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]
=[-2(2a-3)-3(2a+3)]/(2a+3)(2a-3)+[ 2a+15/ (2a-3)(2a+3)]
=(-4a+6-6a-9+2a+15)/(2a-3)(2a+3)
=(-8a+12)/(2a-3)(2a+3)]
=-4/(2a-3)
2、
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1、
( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]
=[-2(2a-3)-3(2a+3)]/(2a+3)(2a-3)+[ 2a+15/ (2a-3)(2a+3)]
=(-4a+6-6a-9+2a+15)/(2a-3)(2a+3)
=(-8a+12)/(2a-3)(2a+3)]
=-4/(2a-3)
2、
[ a+2/a(a-2) ] - (a-1/a^2-4a+4)] ÷ 4-a/a
=((a+2)(a-2)-a(a-1))/a(a-2)²÷4-a/a
=(a-4)/a(a-2)²÷4-a/a
=-1/(a-2)²
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