tangent line problem with unknown a and b

How to find constants in a classic calculus tangent line problem

[@Xylem1342]

omg thankyou so much legend of a woman

[@iGhostSlayer]

L1=L2 ----> M1=M2, if not Then m1xm2=-1 slope line = slope F(x) Thanks

[@Xylem1342]

now i can get a good grade for mathss

[@foolish4694]

How'd you do