Here is the solution..x equals to √3..which is equals to 1.73205
At least they admitted this is algebra not geometry. You'll get the same question next year but they'll call it geometry.
The area is the product of the sides:
![A=(x-6)(3x^2-4x+6)](https://tex.z-dn.net/?f=A%3D%28x-6%29%283x%5E2-4x%2B6%29)
We just distribute and collect terms:
![A=x(3x^2-4x+6) - 6(3x^2-4x+6)](https://tex.z-dn.net/?f=A%3Dx%283x%5E2-4x%2B6%29%20-%206%283x%5E2-4x%2B6%29%20)
![A=3x^3-4x^2+6x - 18x^2 +24x -36](https://tex.z-dn.net/?f=A%3D3x%5E3-4x%5E2%2B6x%20-%2018x%5E2%20%2B24x%20-36)
![A=3x^3- 22x^2+30x-36](https://tex.z-dn.net/?f=A%3D3x%5E3-%2022x%5E2%2B30x-36)
Answer: 3rd choice
7 + 5 + 2 = 14 because seven plus five is twelve, twelve plus two is fourteen.
The digit 5 in th. is 100 times bigger Than the 5 in hu. place