I need the answer for this one

Recall the definition of a polynomial expression. find two polynomial expressions whose quotient, when simplified,is. use that division problem to determine whether polynomials are closed under division. then describe how theother three operations-addition, subtraction, and multiplication-are different from division of polynomials.

What is the value of x? enter your answer in the box. (cm)

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol