Question 924816
What is the distance from point (-a,b) to point (2a,4b)? 
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{{{d = sqrt(diffy^2 + diffx^2)}}}
{{{d = sqrt((3b)^2 + (3a)^2) = sqrt(9b^2 + 9a^2) = sqrt(9)*sqrt(a^2 + b^2)}}}
{{{d = 3sqrt(a^2+b^2)}}}