Please help me this is my final question for the quarter deciding my report card grade

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?

3questions show how you solved the problem 1. subtract & simplify (–y2 – 4y – 8) – (–4y2 – 6y + 3) 2.multiply and simplify 2x2y3z2 · 4xy4x2 3.multiply and simplify (x – 4) (x2 – 5x – 6)

If the diagram polygon abcd is a reflection across ef to make polygon a'b'c'd'.