Question 925842
Do it  like this one:
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a) Find the distance between the points (7,-8) and (-2,4)
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It's the Pythagorean Theorem.
{{{d^2 = diffy^2 + diffx^2 = 12^2 + 9^2}}}
{{{d^2 = 153 = 9*17}}}
{{{d = 3sqrt(17)}}}
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