Write as a polynomial using special product formulas: (a^2-3a)^2

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

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