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

Toán Lớp 8: Rút gọn A=(6x-2) ² +4(3x-1)(2+y)+(y+2) ² B=(5x+5) ² +10(x-3)(1+x)+x ²-6x+9 C = (x-1)²/4+x² -1+(x+1)²

Toán Lớp 8: Rút gọn
A=(6x-2) ² +4(3x-1)(2+y)+(y+2) ²
B=(5x+5) ² +10(x-3)(1+x)+x ²-6x+9
C = (x-1)²/4+x² -1+(x+1)²

Comments ( 2 )

  1. A=(6x-2)² +4(3x-1)(2+y)+(y+2)²
    A=[2(3x-1)]²+4(3x-1)(2+y)+(y+2)²
    A=[2(3x-1)+(y+2)]²
    B=(5x+5)² +10(x-3)(1+x)+x²-6x+9
    B=(5x+5)²+10(x-3)(1+x)+(x-3)²
    B=[5(x+1)+x-3]²
    B=(6x-2)²=[2(3x-1)]²
    C = (x-1)²/4+x² -1+(x+1)²
     C=(x-1)²/4+x²-1+x²+2x+1
    C=(x-1)²/2x²+2x+4
    Cho mk xin hay nhất please
    Thank you

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

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