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

Toán Lớp 8: (X +1)^2 +(x+3)-4x Giải cho em vơid

Toán Lớp 8: (X +1)^2 +(x+3)-4x
Giải cho em vơid

Comments ( 2 )

  1. (x+1)^2 +(x+3) – 4x
    = x^2 + 2x + 1 + x +3 -4x
    = x^2 – x +4
     

  2. (x+1)^2+(x+3)-4x
    =x^2+2x+1+x+3-4x
    =x^2+(2x+x-4x)+(3+1)
    =x^2-x+4
     

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