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

Toán Lớp 8: a,(3x-2y)(2y+3x) b,(4x^2 – 4x +1) : (2x-1).

Toán Lớp 8: a,(3x-2y)(2y+3x)
b,(4x^2 – 4x +1) : (2x-1).

Comments ( 1 )

  1. a)(3x-2y)(2y+3x)
    =3x(2y+3x)-2y(2y+3x)
    =6xy+9x^2-4y^2-6xy
    =9x^2-4y^2
    b)(4x^2 – 4x +1) : (2x-1)
    =(2x-1)^2 : (2x-1)
    =2x-1

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