Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: a)2x(x-5)+x(3-2x) b)(x-x^2+x^3)(1+x)-2x(x^3-2)

Toán Lớp 8: a)2x(x-5)+x(3-2x)
b)(x-x^2+x^3)(1+x)-2x(x^3-2)

Comments ( 1 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
     a) 2x.(x-5)+x.(3-2x)
    = 2x²-10x+3x-2x²
    = (2x²-2x²)+(3x-10x)
    = -7x
    b) (x-x²+x³).(1+x)-2x.(x³-2)
    =( x+x²-x²-x³+x³+x^4)-2x^4-4x
    = x+x^4-2x^4-4x
    = (x-4x)+(x^4-2x^4)
    = -x^4-3x
    Chúc bạn hc tốt!!!
    @anhnguyenff

Leave a reply

222-9+11+12:2*14+14 = ? ( )