Can someone pl answer my recent question??

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?

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

How can (square root of 25) ^2 be rewritten?