Combine these radicals.
3 square root 2 -5 square root 2

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.

What term makes it inconsistent y=2x - 4 ?