(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b) a =-1分之(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b)a =-1分之3 b =3

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(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b) a =-1分之(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b)a =-1分之3 b =3

(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b) a =-1分之(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b)a =-1分之3 b =3
(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b) a =-1分之
(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b)
a =-1分之3 b =3

(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b) a =-1分之(a+2b)(a-2b)+(2a+3b)(4a-b)-(3a-2b)(3a-2b)a =-1分之3 b =3