已知:(x-7)²+121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值已知:(x-7)²=121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值
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![已知:(x-7)²+121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值已知:(x-7)²=121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值](/uploads/image/z/1611427-67-7.jpg?t=%E5%B7%B2%E7%9F%A5%3A%28x-7%29%26%23178%3B%2B121%2C%28y%2B1%29%26%23179%3B%3D-0.064%2C%E6%B1%82%E6%A0%B9%E5%8F%B7x-2-%E6%A0%B9%E5%8F%B7x%2B10y%2B%26%23179%3B%E6%A0%B9%E5%8F%B7245y%E7%9A%84%E5%80%BC%E5%B7%B2%E7%9F%A5%3A%28x-7%29%26%23178%3B%3D121%2C%28y%2B1%29%26%23179%3B%3D-0.064%2C%E6%B1%82%E6%A0%B9%E5%8F%B7x-2-%E6%A0%B9%E5%8F%B7x%2B10y%2B%26%23179%3B%E6%A0%B9%E5%8F%B7245y%E7%9A%84%E5%80%BC)
已知:(x-7)²+121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值已知:(x-7)²=121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值
已知:(x-7)²+121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值
已知:(x-7)²=121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值
已知:(x-7)²+121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值已知:(x-7)²=121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根号245y的值
x-7==±11
x=-4,x=18
y+1=-0.4
y=-1.4
根号有意义则x-2>=0
所以x=18
原式=√16-√4+³√(-343)
=4-2+(-7)
=-5