What is the solution to l+(-3)=9 hurry

Me what is the value of x? showing work would be appreciated - ! : )

Apolynomial function has a root of –6 with multiplicity 1, a root of –2 with multiplicity 3, a root of 0 with multiplicity 2, and a root of 4 with multiplicity 3. if the function has a positive leading coefficient and is of odd degree, which statement about the graph is true?

Which of these figures must be a rectangle?