Question 433415
x2-2x+3x-2+x+5+x+4=47
x2+3x+7=47
x2+3x-40=0
(x+8)(x-5)=0
x=-8,5
Throwing out the negative answer, we get x=5.
The sides are 9,10,13,15.
*[invoke quadratic "x", 1, 3, -40 ]