Answer:
Step-by-step explanation:
Required polynomial
![{x}^{2} - ( \alpha + \beta )x + \alpha \beta \\ \\ = {x}^{2} - ( - 6)x + 5 \\ \\ = {x}^{2} + 6x + 5](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20-%20%28%20%5Calpha%20%20%2B%20%20%5Cbeta%20%29x%20%2B%20%20%5Calpha%20%20%5Cbeta%20%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%7Bx%7D%5E%7B2%7D%20-%20%28%20-%206%29x%20%2B%205%20%5C%5C%20%20%5C%5C%20%20%3D%20%20%7Bx%7D%5E%7B2%7D%20%20%20%2B%206x%20%2B%205)
Answer:
p=300 and l=15.75
Step-by-step explanation:
2x + 2x+2 = -134
4x + 2 = -134
4x = -136 |: 4
x = -34
2x = 2 * (-34) = -68
2x + 2 = -68 + 2 = -66
This numbers are -66 and -68.
Answer:
mkzc bmk.Mxv
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
The area of the triangle can be calculated using formula
![A=\sqrt{p(p-a)(p-b)(p-c)},](https://tex.z-dn.net/?f=A%3D%5Csqrt%7Bp%28p-a%29%28p-b%29%28p-c%29%7D%2C)
where p is half of the perimeter.
1. If a=19, b=20 and c=21, then
![p=\dfrac{a+b+c}{2}=\dfrac{19+20+21}{2}=30\ m.](https://tex.z-dn.net/?f=p%3D%5Cdfrac%7Ba%2Bb%2Bc%7D%7B2%7D%3D%5Cdfrac%7B19%2B20%2B21%7D%7B2%7D%3D30%5C%20m.)
2. The area is
![A=\sqrt{30\cdot (30-19)(30-20)(30-21)}=\sqrt{30\cdot 11\cdot 10\cdot 9}=30\sqrt{33}\approx 172\ m^2.](https://tex.z-dn.net/?f=A%3D%5Csqrt%7B30%5Ccdot%20%2830-19%29%2830-20%29%2830-21%29%7D%3D%5Csqrt%7B30%5Ccdot%2011%5Ccdot%2010%5Ccdot%209%7D%3D30%5Csqrt%7B33%7D%5Capprox%20172%5C%20m%5E2.)