How is the process of adding two polynomials like the process for adding two integers? how is it different?

2.5 milligrams is equivalent to how many grams

Look at the hyperbola graphed below. the hyperbola gets very close to the red lines on the graph, but it never touches them. which term describes each of the red lines? o o o o a. asymptote b. directrix c. focus d. axis

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)