lǎo shī de zhūn zhūn jiào huì duō me lìng wǒ nán wàng a!
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—Your T-shirt is nice. It must be expensive.
—Not at all. I only spend $10 it.
已知x,y,z∈R,且x﹣2y+2z=5,则(x+5)2+(y﹣1)2+(z+3)2的最小值是( )