Question

已知:(x-7)²+121,(y+1)³=-0.064,求根号x-2-根号x+10y+³根

Answer 1

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