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

Toán Lớp 6: $2x^{2}$ + 15 = 47 tìm x 2 phút

Toán Lớp 6: $2x^{2}$ + 15 = 47
tìm x
2 phút

Comments ( 2 )

  1. Giải đáp:
    2x^2 + 15 = 47
    2x^2 = 47 – 15
    2x^2 = 32
    x^2 = 32 : 2
    x^2 = 16
    $ x = ±4 $
    @Akira2007

  2. 2x^2+ 15 = 47
    2x^2=47-15
    2x^2=32
    x^2=32:2
    x^2=16
    =>x=+-4
    Vậy: x=+-4
     

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