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

Toán Lớp 8: x^2-y^2+8(x+2) ptich đa thức thành nhân tử

Toán Lớp 8: x^2-y^2+8(x+2) ptich đa thức thành nhân tử

Comments ( 2 )

  1. x^2-y^2+8(x+2)
    =x^2-y^2+8x+16
    =(x^2+8x+16)-y^2
    =(x+2^2)^2-y^2
    =(x+2^2+y)(x+2^2-y)

  2. x^2-y^2+8(x+2)
    =>x^2-y^2+8x+16
    =>(x^2+8x+16)-y^2
    =>(x+4)^2-y^2
    =>(x+4-y)(x+4+y)
     

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

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