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

Toán Lớp 8: 1. a)(X+4/3.Y^2)^2 b)(2X^2+5/3.Y)^2

Toán Lớp 8: 1.
a)(X+4/3.Y^2)^2
b)(2X^2+5/3.Y)^2

Comments ( 2 )

  1. Giải đáp:
    1a)(x+4/3*y^2)^2
    =(x)^2+2*x*4/3y^2+(4/3y^2)^2
    =x^2+(8xy^2)/3+16/9y^4
    1b)(2x^2+5/3y)^2
    =(2x^2)^2+2*2x^2*5/3y+(5/3y)^2
    =4x^4+20/3x^2y+25/9y^2

  2. 1.
    a)(x+4/3 . y^2)^2
    =x^2+2x.4/3y^2+(4/3y^2)^2
    =x^2+frac\{8xy^2}{3}+16/9y^4
    b)(2x^2+5/3.y)^2
    =(2x^2)^2+2.2x^2.5/3y+(5/3y)^2
    =4x^4+20/3x^2y+25/9y^2

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

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