If all four sides of a quadrilateral measure the same length, and one corner angle measures 90 degrees, circle that shape the quadrilateral can be classified as. a. rhombus b. rectangle c. square d. parallelogram e. all of these

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?