How to solve for shaded area

What is the solution of sqrt x+2-15=-3

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

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?