Hello,
x² + 5x + 6 = 0
a = 1 ; b = 5 ; c = 6
∆ = b² - 4ac = 5² - 4 × 1 × 6 = 25 - 24 = 1 > 0
2 solutions :
![x_{1} = \frac{ - b - \sqrt{\Delta} }{2a} = \frac{ - 5 - 1}{2 \times 1} = \frac{ - 6}{2} = - 3](https://tex.z-dn.net/?f=%20x_%7B1%7D%20%3D%20%20%5Cfrac%7B%20-%20b%20-%20%20%5Csqrt%7B%5CDelta%7D%20%7D%7B2a%7D%20%20%3D%20%20%5Cfrac%7B%20-%205%20-%201%7D%7B2%20%5Ctimes%201%7D%20%20%3D%20%20%5Cfrac%7B%20-%206%7D%7B2%7D%20%20%3D%20%20-%203)
![x_{2} = \frac{ - b + \sqrt{\Delta} }{2a} = \frac{ - 5 + 1}{2 \times 1} = \frac{ - 4}{2} = - 2](https://tex.z-dn.net/?f=x_%7B2%7D%20%3D%20%20%5Cfrac%7B%20-%20b%20%20%2B%20%20%20%5Csqrt%7B%5CDelta%7D%20%7D%7B2a%7D%20%20%3D%20%20%5Cfrac%7B%20-%205%20%20%2B%201%7D%7B2%20%5Ctimes%201%7D%20%20%3D%20%20%5Cfrac%7B%20-%204%7D%7B2%7D%20%20%3D%20%20-%202)
S = { -3 ; -2}
Answer:
1/15
Step-by-step explanation:
2/3*5/5 - 3/5*3/3( we are multiplying and dividing by the same number in order to get the same denominator. as 5/5 = 1 and 3/3= 1)
2/3*5/5 - 3/5*3/3
= 10/15-9/15
= 1/15
The money needed to buy materials to find the job. He had to use 35 of the money he earns to get new supplies or to clean the things he has.
Step-by-step explanation:
4426 hours on both weekends