What equation is equivalent to 2(4x+3)-5x=1

Ineed solving this problem h/8=-25 solve for h idk how to this can someone show me and also give an answer you

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

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