hi all. my homework question is what is the derivative of: [(a + t * b) x (a + t * b + t^(2) * c)] a, b, and c are vectors, and t is a constant. * is multipy, ^(2) is squared, and x is cross product. i've been working on it for hours and i have no idea what to do. there's another similar problem which i have the answer to. it asks to find the derivative of: [(a + t * b) x (c + t * d)] it has the same specs, with d being another vector. the answer to this one is: (a x d) + (b x c) + 2t(b x d) i just don't see how these connect and can actually be equivalent. help would be ridiculously appreciated.