Question

найдите корни трехчлена
1)x^2-8x+7

2)x^2-8x+15

3)X^-11X+30

4)X^2-21X+110

Answer 1

1)x^2-8x+7
x=1, x=7
2)x^2-8x+15
x=3, x=5
3)X^-11X+30
???
4)X^2-21X+110
x=10, x=11