The following points are given in cylindrical coordinates; express each in rectangular coordinates and spherical coordinates.

Write the expression 7x^3-28xy^2 as the product of 3 factors

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a