将函数y=x2+6x+11的图像按向量a平移后得函数y=x2的图像,则向量a=_________

将函数y=x²+6x+11的图像按向量a平移后得函数y=x²的图像,则向量a=___________.

答案

答案：(3,-2)

解析：

函数y=x²+6x+11的顶点为(-3,2),函数y=x²的顶点为(0,0).

∴a

=(0,0)-(-3,2)=(3,-2).∴a=(3,-2).

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