tìm x biết: (x+2)^3+x(3x+1)^2-4x(1+2x)(2x-1)=-6

Question

tìm x biết: (x+2)^3+x(3x+1)^2-4x(1+2x)(2x-1)=-6

in progress 0
Orla Orla 6 years 2020-11-25T17:17:25+00:00 1 Answers 95 views 0

Answers ( )

  1. Adela
    0
    2020-11-25T17:18:51+00:00
    Reply

    (x+2)^3+x(3x+1)^2-4x(1+2x)(2x-1)=-6

    x^3+6x^2+12x+8+x(9x^2+6x+1)-(4x+8x^2)(2x-1)=-6

    x^3+6x^2+12x+8+9x^3+6x^2+x-8x^2+4x-16x^3+8x^2=-6

    -6x^3+12x^2+17x+8=-6

     

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )