Fortunately, I belong to an otaku, and I can help you type them out one by one. Since I am from high school, let me help you understand: Let the analytical formula of the straight line L be y=k*(x+4)=kx+4k, and remember that kx+4k-y = 0///This is based on the point (-4, o). You can also know that the radius of the garden is 5, because AB is 8 long, so you should make a line passing through the center of the circle. This step is very important. Do you know the distance formula from a point to a straight line? |Ax+By+C|

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Under the root sign (the square of a plus the square of b), so the distance d=4=|-k+4k-2| =3! ! ! ! ! ! ! ! ! ! The important thing is.

Under the root sign (the square of k plus the square of-1)

You can solve k and bring it into the linear equation to get the linear equation. 9k squared +4- 12k=9k squared +9.

Solve k=-5/ 12