What sales tax, at the rate of 5% must you pay on the purchase of a computer hard drive that cost $229?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤

Will gve pints stars and brainliest