I need help with these 4

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

The domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top