How do you figure the area of a triangle

Let f (x) = x e8x. find a formula for the nth derivative of f, where n is any positive integer. use x and n in your answer if needed. f (n)(x) =

The radical equation 2+√2x-3 = √x+7 has a solution set [x= a0} and an extraneous root x = a1.

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.