30.8k views
4 votes
Can someone answer 7-11 for me by 12:00AM

Can someone answer 7-11 for me by 12:00AM-example-1
User UlfR
by
8.0k points

1 Answer

3 votes

Answer:

Explanation:

7). x + y = 4 ⇒ y = 4 - x -----> xy = - 96

x(4 - x) = - 96 ⇔ x² - 4x - 96 = 0

D = ( - 4)² - 4(1)(- 96) = 400 = (20)²


x_(1) = (- ( - 4) - 20) ÷ 2(1) = - 8


x_(2) = ( - ( - 4) + 20) ÷ 2 = 12

Numbers are - 8 and 12

8). It's your turn now. You can do it

9). x² - 5x + 3 = 0

0 <
x_(1) < 1

4 <
x_(2) < 5

10). - x² + 3x + 1 = 0

-1 <
x_(1) < 0

3 <
x_(2) < 4

11). x² + 2x - 2 = 0

- 3 <
x_(1) < - 2

0 <
x_(2) < 1

Can someone answer 7-11 for me by 12:00AM-example-1
Can someone answer 7-11 for me by 12:00AM-example-2
Can someone answer 7-11 for me by 12:00AM-example-3
User Papillon
by
8.7k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories