First, you find the length and width which are 16 and 12. Using the Pythagorean theorem (a2+b2=c2) , you can figure it out. We know A and B, 162+122=c2. Go on further and you get 256+144=c2 then 400=c2 and finally c=20. The diagonal is 20 units.
sorry, I read the problem wrong the first time, the real answer is x≤−√3 or −1 < x ≤ √3
{THIS ANSWER IS WRONG, PLEASE READ MY SECOND ANSWER} You first multiply both sides by (x+1) and you get x+3=x2+x. You then subtract x from both sides and you get 3=x2 which is \(\sqrt{3}\)=x.
22.5 square units
