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

Toán Lớp 8: Tìm x a. (x+8)(x-6)-x^2=2 b.x^2(x-5)-4x+20=0 c.x(4-3x)+3x(x-2)=8 d.x^2-6x+9=25 e.x^3-0,25x=0 g,3(x+5)-5x-x^2=0

Home/ Toán Lớp 8: Tìm x a. (x+8)(x-6)-x^2=2 b.x^2(x-5)-4x+20=0 c.x(4-3x)+3x(x-2)=8 d.x^2-6x+9=25 e.x^3-0,25x=0 g,3(x+5)-5x-x^2=0

Toán Lớp 8: Tìm x a. (x+8)(x-6)-x^2=2 b.x^2(x-5)-4x+20=0 c.x(4-3x)+3x(x-2)=8 d.x^2-6x+9=25 e.x^3-0,25x=0 g,3(x+5)-5x-x^2=0

Tháng Bảy 9, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: Tìm x
a. (x+8)(x-6)-x^2=2
b.x^2(x-5)-4x+20=0
c.x(4-3x)+3x(x-2)=8
d.x^2-6x+9=25
e.x^3-0,25x=0
g,3(x+5)-5x-x^2=0

Comments ( 2 )

  1. tuyethutanhthu
    tuyethutanhthu
    9 Tháng Bảy, 2022 at 6:42 sáng
    Reply
    Lời giải và giải thích chi tiết:
     Làm câu g
    $3(x+5)-5x-x^2=0$
    $=>3(x+5)-x(5+x)=0$
    $=>(x+5)(3-x)=0$
    $=\left[\begin{matrix} x+5=0\\ 3-x=0\end{matrix}\right.=>\left[\begin{matrix} x=-5\\ x=3\end{matrix}\right.$

  2. tonhu12
    tonhu12
    9 Tháng Bảy, 2022 at 6:41 sáng
    Reply

    Câu g chị bỏ nhé :(( sorry
    toan-lop-8-tim-a-8-6-2-2-b-2-5-4-20-0-c-4-3-3-2-8-d-2-6-9-25-e-3-0-25-0-g-3-5-5-2-0

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

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