x=-2时的值为7∴-32a-8b-2c-5=732a+8b+2c=-12当x=2时ax的五次方+bx的三次方+cx-5=32a+8b+2c-5=-12-5=-17
当x=-2时a(-2)^5+b(-2)^3+(-2)c-5=7a(-2)^5+b(-2)^3+(-2)c=12当x=2时a2^5+b2^3+c2-5=-(a(-2)^5+b(-2)^3+(-2)c)-5=-12-5=-17