Find the distance from (2,-1) to the line y=2x+3.
The answer is 8/5*root5 by the way, but I want to know how to solve.
I used distance formula.
sqrt ( (x-2)^2 + (y+1)^2)
sqrt ( (x-2)^2 + (2x+3+1)^2)
sqrt ( (x-2)^2 + (2x+4)^2)
sqrt (5x^2 + 12x + 20)
When I enter this on my calculator to solve for x, it cannot do it. What should I do next?

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you don't use X

What kind of calculator are you using? Are you using the solve feature?

Yes I am usin the solve feature.

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