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

Toán Lớp 7: (x-1)mũ 5 = -32 (x- 5 ) mũ 2 = (1-3x) mũ 2

Tháng Bảy 29, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: (x-1)mũ 5 = -32
(x- 5 ) mũ 2 = (1-3x) mũ 2

Comments ( 2 )

  1. thanhthuythu
    thanhthuythu
    29 Tháng Bảy, 2022 at 5:18 chiều
    Reply
    (x-1)^5=-32
    (x-1)^5=(-2)^5
    x-1=-2
    x=-2+1
    x=-1
    (x-5)^2=(1-3x)^2
    (x-5)^2-(1-3x)^2=0
    (x-5-1+3x)(x-5+1-3x)=0
    (4x-6)(-2x-4)=0
    -4.(2x-3)(x+2)=0
    (2x-3)(x+2)=0
    TH1
    2x-3=0
    2x=3
    x=3/2
    TH2
    x+2=0
    x=-2
    Cho mk xin hay nhất please
    Thank you

  2. cobebongdem
    cobebongdem
    29 Tháng Bảy, 2022 at 5:18 chiều
    Reply
    (x – 1)^{5} = -32
    => (x-1)^{5} = -2^{5}
    => x – 1 = -2
    => x = -2 + 1
    => x = -1
    (x – 5)^{2} = ( 1 – 3x)^{2}
    => x – 5 = 1 – 3x
    => x – 5 + 3x = 1
    => 4x – 5 = 1
    => 4x = 1 + 5 = 6
    => x = 6 : 4 = 3/2
     

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

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