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

Toán Lớp 8: 2) ????????(???? − ????) − (???????? − ????)???? 3) (???????? + ????)???? + (???? + ????)(???? − ????) 4) (???? + ????)(???????? − ???? + ????) − ???????? + ???? 5) (???? + ????)???? − (???? +

Home/ Toán Lớp 8: 2) ????????(???? − ????) − (???????? − ????)???? 3) (???????? + ????)???? + (???? + ????)(???? − ????) 4) (???? + ????)(???????? − ???? + ????) − ???????? + ???? 5) (???? + ????)???? − (???? +

Toán Lớp 8: 2) ????????(???? − ????) − (???????? − ????)???? 3) (???????? + ????)???? + (???? + ????)(???? − ????) 4) (???? + ????)(???????? − ???? + ????) − ???????? + ???? 5) (???? + ????)???? − (???? +

Tháng Tám 30, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: 2) ????????(???? − ????) − (???????? − ????)????
3) (???????? + ????)???? + (???? + ????)(???? − ????)
4) (???? + ????)(???????? − ???? + ????) − ???????? + ????
5) (???? + ????)???? − (???? + ????)(???? − ????)

Comments ( 2 )

  1. tonhu12
    tonhu12
    30 Tháng Tám, 2022 at 5:09 chiều
    Reply
    ~ Bạn tham khảo ~
    2, 3x(x-5)-(2x-1)^2
    = 3x^2-15x-4x^2+4x-1
    = -x^2-11x-1
    3, (2x+3)^2 + (x+3)(2-x)
    = 4x^2+12x+9+2x-x^2+6-3x
    = 3x^2+11x+15
    4, (x+1)(x^2-x+1)-x^3+8
    = x^3+1-x^3+8
    = 9
    5, (x+1)^3 – (x+2)(x-2)
    = x^3+3x^2+3x+1-x^2+4
    = x^3+2x^2+3x+5

  2. ngoclanquynh
    ngoclanquynh
    30 Tháng Tám, 2022 at 5:08 chiều
    Reply
    #tnvt
    2)3x(x-5)-(2x-1)^2
    =3x^2-15x-4x^2+4x-1
    =-x^2-11x-1
    3)(2x+3)^2+(x+3)(2-x)
    =4x^2+12x+9+2x-x^2+6-3x
    =3x^2+11x+15
    4)(x+1)(x^2-x+1)-x^3+8
    =x^3+1^3-x^3+8
    =1+8
    =9
    5)(x+1)^3-(x+2)(x-2)
    =x^3+3x^2+3x+1-x^2+4
    =x^3+2x^2+3x+5
     

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

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