Karen Morrison and Nick Hamshaw Solutions for Exercise 14: Exercise 18.14

Find the equation of the tangent of given curve at the point with coordinate $\left(3,9\right)$
$y=x^2$

Find the equation of the tangent of given curve at the point with $x$- coordinate $-2$
$y=x^2$

Find the equation of the tangent of given curve at the point with $x$- coordinate $4$
$y=x^3+x^2$

Find the equation of the tangent of given curve at the point with $x$- coordinate $1.5$
$y=3x^3-2x+1$