Question

Помогите с номером срочно!!Даю 99 баллов!!!

Answer 1

x²-39x+324=0
x1+x2=39
x1x2=324
(x1+x2)²-2x1x2=39²-2*324=1521-648=873
x1²+x2²=(x1+x2)²-2x1x2=873
(x1-x2)²+4x1x2=x1²-2x1x2+x2²+4x1x2=x1²+2x1x1+x2²=(x1+x2)²=39²=1521
x1³+x2³=(x1+x2)(x1²-x1x2+x²2)=(x1+x2)((x1²+x2²)-x1x2)=39*(873-324)=39*549=21411