Prove: if b ≠ 0, then the cross product term can be eliminated from the quadratic form ax² + 2bxy + cy² by rotating the coordinate axes through an angle θ that satisfies the equation cot 2θ = a-c/2b.

hi,

6x times 4 is 24x and 5 times 4 is 20, so the answer is 24x+20.

hope this and for a little humor i am groot.

4 puzzles in 3 hours

step-by-step explanation:

step-by-step explanation:

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.