\((1)\)分解因式:\(3a{x}^{2}-6axy+3a{y}^{2} =\)_______________.
\((2)\)若三角形的三边长分别为\(3\),\(4\),\(x-1\),则\(x\)的取值范围是______________.
\((3)\)将抛物线\(y={{x}^{2}}\)图象向右平移\(2\)个单位再向下平移\(3\)个单位,所得图象的解析式为__________.
\((4)\)如图:\(M\)为反比例函数\(y= \dfrac{k}{x} \)图象上一点,\(MA⊥y\)轴于\(A\),\({{S}_{\vartriangle MAO}}=2\)时,\(k=\)_____________.
\((5)\)若一个圆锥的侧面积是它底面积的\(2\)倍,则这个圆锥的侧面展开图的圆心角是_______________.
\((6)\)抛物线\(y=a{{x}^{2}}+bx+c(a,b,c\)为常数,且\(a\neq 0)\)经过点\((-1,0)\)和\((m,0)\),且\(1 < m < 2\),当\(x < -1\)时,\(y\)随着\(x\)的增大而减小\(.\)下列结论:\(①abc > 0\);\(②a+b > 0\);\(③\)若点\(A(-3,y_{1})\),点\(B(3,y_{2})\)都在抛物线上,则\({y}_{1} < {y}_{2} \);\(④a(m-1)+b=0\);\(⑤\)若\(c\leqslant -1\),则\({b}^{2}-4ac\leqslant 4a .\)其中结论错误的是_________________\(.(\)只填写序号\()\)