Hello, Marc!

This takes some Olympic-level gymnastics . . .

I'll do part (a) . . .Rewrite in the form:

We have: . .[1]

Use the two coefficients as legs of a right triangle.

. . Find the hypotenuse: .

Multiply by .[2]

Let be in a right triangle with: .Then: .Code:* * * __ * * √61 * * 6 * * * φ * * * * * * 5

Substitute into [2]: .

Therefore, we have: .