Please please someone help me

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

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?

Hurry which expression is equivalent to 3√x^5y?