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, 2020 x(x-3)+x-3=0 b, 2x(x-2)-(x+1)(2x-8)=3x

Toán Lớp 8: a, 2020 x(x-3)+x-3=0
b, 2x(x-2)-(x+1)(2x-8)=3x

Comments ( 1 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
     a) 2020x(x – 3) + (x – 3) = 0
    ⇔ (x – 3)(2020x + 1) = 0
    ⇒ x = 3
    hoặc x = \frac{-1}{2020}
    b) 2x(x – 2) – (x + 1)(2x – 8) = 3x
    ⇔ 2x² – 4x – 2x² + 8x – 2x + 8 = 3x
    ⇔ – x = – 8
    ⇔   x = 8

Leave a reply

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

About Thảo