当-3<x<5时,化简√x²+6x+9 +√x²-10x+25=?
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![当-3<x<5时,化简√x²+6x+9 +√x²-10x+25=?](/uploads/image/z/2713505-41-5.jpg?t=%E5%BD%93-3%EF%BC%9Cx%EF%BC%9C5%E6%97%B6%2C%E5%8C%96%E7%AE%80%E2%88%9Ax%26%23178%3B%2B6x%2B9+%2B%E2%88%9Ax%26%23178%3B-10x%2B25%3D%3F)
当-3<x<5时,化简√x²+6x+9 +√x²-10x+25=?
当-3<x<5时,化简√x²+6x+9 +√x²-10x+25=?
当-3<x<5时,化简√x²+6x+9 +√x²-10x+25=?
即x+3>0
x-5
当-3<x<5时,
√x²+6x+9 +√x²-10x+25
=√(x+3)²+√(x-5)²
=│x+3│+│x-5│
=x+3+5-x
=8