Question

若|x+2y-5|+(2y+3z-13)²+（3z+x-10)²=0,求x,y,z,的值

Answer 1

若|x+2y-5|+(2y+3z-13)²+（3z+x-10)²=0

有题可知

x+2y-5=0 (1)

2y+3z-13=0 (2)

3z+x-10=0 (3)

(1)-(3)

2y-3z+5=0 (4)

(4)+(2)

4y-8=0

y=2

z=(13-2y)/3=3

x=5-2y=1