已知|2x-3y-5|与√x+y-15互为相反数,求x²+y²的立方根
问题描述:
已知|2x-3y-5|与√x+y-15互为相反数,求x²+y²的立方根
答
|2x-3y-5|与√x+y-15互为相反数
2x-3y-5=0且x+y-15=0
联立方程,解得x=10 ,y=5
x²+y²的立方根
=10²+5²立方根
=125立方根
=5