Root2is a polynomial of which degree -0,1,2or 3
give reasons also

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

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?

Answer! if you don’t mind, can you explain