Solve the below:
Q1: Find an equation for the tangent line at the given curve at the point where x=x0;
a. y=(x^2+3x-1)(2-x); x0=1
b. y=x+7/5-2x; x0;=0
Q2:Find all points on the given graph of the given function where the tangent line is horizontal.
f(x)=(x-1)(x^2-8x+7)