Toán Lớp 8: a,(3x-4)^2 b,(2x+5)^3 c,(4x-y)^3 d,(2x+y)^3 e,(x-1)^3 f,(x+1)^3 g,(x-2)^3 k,(x+3)^3 l,x^3+6x m,x^3-1 n,x^3+27

Question

Toán Lớp 8:  a,(3x-4)^2 b,(2x+5)^3 c,(4x-y)^3 d,(2x+y)^3 e,(x-1)^3 f,(x+1)^3 g,(x-2)^3 k,(x+3)^3 l,x^3+6x m,x^3-1 n,x^3+27

chauhoangmy98 · Answer

Mik ko ch&eacute;p đề v&agrave; l&agrave;m nhanh lu&ocirc;n bạn nhớ   a)9x&sup2;-24x+16   b)8x&sup3;+60x&sup2;+150x+125   c)64x&sup3;-48x&sup2;y+6xy&sup2;-y&sup3;   d)8x&sup3;+12x&sup2;+6xy&sup2;+y&sup3;   e)x&sup3;-3x&sup2;+3x-1   f)x&sup3;+3x&sup2;+3x+1   g)x&sup3;-6x&sup2;+12x-8   k)x&sup3;+9x&sup2;+27x+27   l)x&sup3;+∛6x = ( x + ∛6x )( x 2  - x∛6x + ∛6x 2  ).   m) x&sup3;-1&sup3;=( x - 1 )( x 2  + x + 1 ).   n)x&sup3;+3&sup3;= ( x + 3 )( x 2  - 3x + 9 ).   xin hay nhất plzzzzz

khanhlanchau · Answer

Giải đáp + Lời giải và giải thích chi tiết:    a) (3x-4)&sup2; = 9x&sup2; -24x +16     b) (2x+5)&sup3; = (8x&sup3; +60x&sup2; +150x +125)     c)  (4x-y)&sup3; = (64x&sup3; +48x&sup2;y +12xy&sup2; +y&sup3;)     d) (2x+y)&sup3;= (8x&sup3; +12x&sup2;y +6xy&sup2; +y&sup3;)     e) (x-1)&sup3; = (x&sup3; - 3x&sup2; +3x -1)     f)  (x+1)&sup3; = (x&sup3; +3x&sup2; +3x +1)     g)  (x-2)&sup3; = (x&sup3; +6x&sup2; +12x +8)     k)  (x+3)&sup3; = (x&sup3; +9x&sup2; +27x +27)     l)     x&sup3;+6x = x(x&sup2; +6)     m) x&sup3;-1 = (x -1)(x&sup2; +x +1)     n)  x&sup3;+27 = (x+3)(x&sup2; -3x +9)     Mk xin hay nhất ạ