Really simple math question, pls help

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 1, 2−√3

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

What power can you write to represent the volume of the cube shown? write the power as an expression with a base and an exponent and then find the volume of the cube