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

Toán Lớp 8: (9x+5)(6x-5) :>>>>

Toán Lớp 8: (9x+5)(6x-5) :>>>>

Comments ( 1 )

  1. (9x+5)(6x-5)
    =9x.(6x-5)+5.(6x-5)
    =(9x.6x)-(5.9x)+(5.6x)-(5.5)
    =54x^2-45x+30x-25
    =54x^2-15x-25

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

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