3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2

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3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2
3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2

3a^2+2ab-(a-2b)/3+(8a^2-12ab+a-b)/6,其中a=2,b=-3/2
3a²+2ab-(a-2b)/3+(8a²-12ab+a-b)/6
=[9a²+6ab-(a-2b)]/3+(8a²-12ab+a-b)/6
=[18a²+12ab-2(a-2b)]/6+(8a²-12ab+a-b)/6
=(18a²+12ab-2a+4b+8a²-12ab+a-b)/6
=(26a²-a+3b)/6=26×4-2-9/2
=65/4

哎,我是文傻~

(a-b)^3+2ab(a-b) ab/a+b=3 a-2ab+b/2a-3ab+2b? 3(-ab+2a)-(3a-b) 3(-ab+2a)-(3a-b) (ab(a^-2ab)-a^2b(a-3b))÷（3a^b） -2ab乘以(-a^+6a^b-3a+b) 18ab(a-b)^2-12a(b-a)^3 a^3-ab^2 =a （a^2 -b^2) =a(a+b)(a-b) a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快 3(-2ab+3a)-(2a-b)+6ab 3(-ab+2a)-(3a-b)+2ab 3（-ab+2a)-(3a-b）+3ab 化简:(-2ab+3a)-(2a-b)+6ab ab^3+b^2+b-a+1 (a-b)(3ab+2a²b-b³) a^2-3ab+b^2/ab=( )/ab-3 a^2-3ab+b^2/ab=( )/ab -3 1.(a-b)(a^2+ab+b^3)2.(a-b)(a^3+a^2b+ab^2+b^3)3.(a-b)(a^4+a^3b+a^2b^2+ab^3+b^4)4.(a-b)(a^10+a^9b+a^8b^2+...+ab^9+b^10)5.（X-1)(x^5+x^4+x^3+x^2+1)6.(a-b)(a^n+a^n-1b+a^n-2b^2+...+ab^n-1+b^n)