Question

Find the distance between (a,b) and (-a,-b)
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Answer 1

Step-by-step explanation:

$distance = \sqrt{ {(a + a)}^{2} + {(b + b)}^{2} } \\ \\ = \sqrt{ {(2a)}^{2} + {(2b)}^{2} } \\ \\ =2 \sqrt{ {a}^{2} + {b}^{2} }$