(x + 2)(- 8x + 1) are your factors.
1.


3500(1.64) = 5740
2.


25300(3.07) = 77671
Hope that helps. Feel free to ask any questions
1/8x2 and 4x I had usa test prep
You can't, it has been done before but there is a fault in the working because the 2 numbers are different. If you want to see a video of someone attempt it, I believe there is a video on the numberphile channel.
Hope this helps :)