Answer:
1±√5
Step-by-step explanation:
![\bf x^2-2x-2=0\Rightarrow x=\displaystyle\frac{-(-2)\pm\sqrt{(-2)^2-4*2*(-2)}}{2}\Rightarrow\\\\\Rightarrow x=\displaystyle\frac{2\pm\sqrt{4+16}}{2}=\displaystyle\frac{2\pm\sqrt{20}}{2}=\displaystyle\frac{2\pm2\sqrt{5}}{2}\Rightarrow\\\\\Rightarrow \boxed{x=1\pm\sqrt{5}}](https://tex.z-dn.net/?f=%5Cbf%20x%5E2-2x-2%3D0%5CRightarrow%20x%3D%5Cdisplaystyle%5Cfrac%7B-%28-2%29%5Cpm%5Csqrt%7B%28-2%29%5E2-4%2A2%2A%28-2%29%7D%7D%7B2%7D%5CRightarrow%5C%5C%5C%5C%5CRightarrow%20x%3D%5Cdisplaystyle%5Cfrac%7B2%5Cpm%5Csqrt%7B4%2B16%7D%7D%7B2%7D%3D%5Cdisplaystyle%5Cfrac%7B2%5Cpm%5Csqrt%7B20%7D%7D%7B2%7D%3D%5Cdisplaystyle%5Cfrac%7B2%5Cpm2%5Csqrt%7B5%7D%7D%7B2%7D%5CRightarrow%5C%5C%5C%5C%5CRightarrow%20%5Cboxed%7Bx%3D1%5Cpm%5Csqrt%7B5%7D%7D)
6:3 if the ratio of the volume
Answer:
5y + 8
and
8y +5 are the same solutions.
Answer:
g
Step-by-step explanation:
25% of the total students = 28
0.25x = 28....where x is the total students
x = 28 / 0.25
x = 112 <== total students in 8th grade