I need help figuring out the angle measure

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

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

Which equation can be simplified to find the inverse of y = 2x2^2