(2x-3)(2x-3)-5(2x-3)+6=0大神们帮帮忙希望你们帮我!
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(2x-3)(2x-3)-5(2x-3)+6=0大神们帮帮忙希望你们帮我!
(2x-3)(2x-3)-5(2x-3)+6=0大神们帮帮忙
希望你们帮我!
(2x-3)(2x-3)-5(2x-3)+6=0大神们帮帮忙希望你们帮我!
第一种方法:令y=2x-3 则y*y-5y+6=0 y=2或3 得x=2.5或3 第二种方法:(2x-3)(2x-3)-5(2x-3)+6=0 (2x-3)(2x-3-5)+6=0 (2x-3)(2x-8)+6=0 4x^2-22x+30=0 即x^2-11/2+15/3=0 则(x-3)(x-5/2)=0 则x1=3,x2=5/2
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*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
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