If i have a room that is 15' x 20' what are the parameters of the room

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?

What are the domain and range of the function f(x)=2^x+1

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b