已知n為正整數,且x^2n=5,求3(x^n)^2+2(x^3n)^2+35的值

已知n為正整數,且x^2n=5,求3(x^n)^2+2(x^3n)^2+35的值

3(x^n)^2+2(x^3n)^2+35
=3(x^2n)+2(x^2n)^3+35
=3*5+2*5^3+35
=15+250+35
=300