解由x＝－5，y＝7则a(-5)^5+b(-5)^3+c*(-2)-5=7即-a(5)^5-b(5)^3-c*(2)=12即a(5)^5+b(5)^3+c*(2)=-12故x=5时，y=a(5)^5+b(5)^3+c*(2)-5=-12-5=-17.
