Based off of inferring that you meant angles rather than "lengths"...
All angles of any triangle must add up to 180<span>° to be classified as a triangle.
Therefore NO, given that the triangle provided adds up to 252</span><span>° </span>
<span>(4x³-4+7x)-(2x³-x-8) = </span>4x³-4+7x<span> - </span>2x³ + x+8 = (4x³-2x³) + (7x+x) -4+8 =
= 2x³ + 8x +4
(4x³-4+7x)-(2x³-x-8) = 2x³ + 8x +4
Https://us-static.z-dn.net/files/dcd/907ce7da2d6eed1570a8ec7d30e4df2a.jpeg
The answer to this is y=x+5