FIND THE DIFFERENCE: (3x^2-5x+2)-(2x^2+2x-1)

1. 5x^2+3x-1
2. X^2-7x+3
3.5x^2+7x-1
4.other

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap