Điền đẳng thức vào những chỗ trống
1/ 64x2 +...... + .......= ( ...... + 9)2
2/ 16y2 + ......+ y = ( .......+.........)2
3/ .......+ 6z + ...... = (......+1)2
4/ .......+ 12y +....... = ( 2y +....... )2
5/ ....... + ......... + 25x2 = ( y + ....)2
6/ ........ + 6x + .......... = (...... + ........)
1)\(64x^2+144x+81=\left(8x+9\right)^2\)
2)\(16y^2+\frac{1}{64}+y=\left(4y+\frac{1}{8}\right)^2\)
3)\(9z^2+6z+1=\left(3z+1\right)^2\)
4)\(4y^2+12y+9=\left(2y+3\right)^2\)
5)\(y^2+10xy+25x^2=\left(y+5x\right)^2\)
6)\(x^2+6x+9=\left(x+3\right)^2\)