Final value of a if distance between the points (-9 cm, a cm) and (3 cm, 3cm) is `13` cm.
Text Solution
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By using distance formula `d=sqrt((x_(2)-x_(1))^(2)+(y_(2)-y_(1))^(2))rArr13=sqrt([13-(-9)]^(2)+[3-a]^(2))` `rArr 13^(2)=13^(2)+(3-a)^(2)=13^(2)-12^(2)=5^(2)rArr(3-a)=+-5rArra=-2cm" "i s" 13 cm`.
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