Step-by-step explanation: subtract 3 - 5 and you get - 2 distribute that through all the parenthesis and you end up with your answer c: if that makes sense
Use the pythagorean theorem. So 4^2 + 7^2 = 10^2. Simplify to 16+49=100. This simplifies to 65=100 which is not true so these sides cannot make a triangle.
