合并同类项: -5a^b+6ab^-4ab-2a^b+4ab+3合并同类项,在求代数式的值: (1)6x+2x^-3X+X^+1,其中x=-5 (2)1/3m-3/2n-5/6n-1/6m,其中m=6,n=3. 拜托拜托
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![合并同类项: -5a^b+6ab^-4ab-2a^b+4ab+3合并同类项,在求代数式的值: (1)6x+2x^-3X+X^+1,其中x=-5 (2)1/3m-3/2n-5/6n-1/6m,其中m=6,n=3. 拜托拜托](/uploads/image/z/3652436-20-6.jpg?t=%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%EF%BC%9A+-5a%5Eb%2B6ab%5E-4ab-2a%5Eb%2B4ab%2B3%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%2C%E5%9C%A8%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F%E7%9A%84%E5%80%BC%EF%BC%9A+%EF%BC%881%EF%BC%896x%2B2x%5E-3X%2BX%5E%2B1%2C%E5%85%B6%E4%B8%ADx%3D-5+%EF%BC%882%EF%BC%891%2F3m-3%2F2n-5%2F6n-1%2F6m%2C%E5%85%B6%E4%B8%ADm%3D6%2Cn%3D3.+++++++++++%E6%8B%9C%E6%89%98%E6%8B%9C%E6%89%98)
合并同类项: -5a^b+6ab^-4ab-2a^b+4ab+3合并同类项,在求代数式的值: (1)6x+2x^-3X+X^+1,其中x=-5 (2)1/3m-3/2n-5/6n-1/6m,其中m=6,n=3. 拜托拜托
合并同类项: -5a^b+6ab^-4ab-2a^b+4ab+3
合并同类项,在求代数式的值:
(1)6x+2x^-3X+X^+1,其中x=-5
(2)1/3m-3/2n-5/6n-1/6m,其中m=6,n=3. 拜托拜托
合并同类项: -5a^b+6ab^-4ab-2a^b+4ab+3合并同类项,在求代数式的值: (1)6x+2x^-3X+X^+1,其中x=-5 (2)1/3m-3/2n-5/6n-1/6m,其中m=6,n=3. 拜托拜托
-5a^2b+6ab^2-4ab-2a^2b+4ab+3
=-5a^2b-2a^2b+6ab^2-4ab+4ab+3
=(-5-2)a^2b+6ab^2+3
=-7a^2b+6ab^2+3
6x+2x^2-3x+x^2+1
=6x-3x+2x^2+x^2+1
=3x+3x^2+1
=3*(-5)+3*(-5)^2+1
=-15+75+1
=61
1/3m-3/2n-5/6n-1/6m
=1/3m-1/6m-3/2n-5/6n
=2/6m-1/6m-9/6n-5/6n
=1/6m-14/6n
=1/6m-7/3n
=1/6*6-7/3*3
=1-7
=-6
-5a^b+6ab^-4ab-2a^b+4ab+3
=-7a^b+6ab^+3
6x+2x^-3X+X^+1
=3x^+3x+1
=3*25+3*(-5)+1
=61
1/3m-3/2n-5/6n-1/6m
=1/6m-14/6n
=1/6*6-7/3*3
=1-7
=-6