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Вопрос по алгебре:
Один из корней уравнения 5x2+bx+24=0 равен 8. Найдите второй корень и коэффициент b.
0,6
b = -30
0,6
b = 43
0,6
b = -43
6
b = -43-
Автор:
javier
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5x²+bx+24=0
Подставим известный корень в уравнение и найдем коэффициент b:
5*8²+8b+24=0; 5*64+8b+24=0; 320+8b+24=0; 344+8b=0; b=-344/8 = -43.
Уравнение имеет вид:
5x²-43x+24=0; D = b²-4ac= 43²-4*5*24= 1849-480 = 1369=37²;
x₁,₂ = (-b ± √D)/2a;
x₁ = (43-37)/10 = 0,6
x₂ = (43+37)/10 = 8
Коэффициент b = -43, второй корень = 0,6.
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As success and profits rose, Milton Hershey invested more money in the infrastructure of his town and added a sports arena, a stadium, and a school for orphaned children.
Milton Hershey died in Hershey, Pennsylvania, in 1945, one year after his retirement as chairman of the board. He was 88 years old. By the end of his life Hershey had donated most of his money to his town and the school for orphans. His chocolate factory remains the largest in the world. The town of Hershey is still home to about 12,000 people and draws more than 30 million visitors each year. They come to see the famous Hershey Park, which boasts a roller coaster, Ferris wheel and other rides. The factory tours draw more visitors annually than the White House. Guests can take a tour through a mock chocolate factory that includes a ride through a simulated roasting oven, and eating samples of Hershey chocolate.
The Hershey company was named after the man who had started it.
1) True
2) False
3) Not stated
Milton Hershey tried some other jobs before he started making chocolate.
1) True
2) False
3) Not stated
Milton Hershey’s aunt ran a successful business of her own.
1) True
2) False
3) Not stated
Milton Hershey closed his first shop because it did not make money.
1) True
2) False
3) Not stated
Milton Hershey produced his chocolate in strict accordance with the Swiss recipe.
1) True
2) False
3) Not stated
The Nickel Bar was expensive chocolate for elite customers.
1) True
2) False
3) Not stated
Milton Hershey gave lots of money to charity projects.
1) True
2) False
3) Not stated
It was Milton Hershey’s idea to create Hershey Park.
1) True
2) False
3) Not stated -
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