Q. 1 E4.3( 18 Votes )

Find the distance

Answer :

In this question, we have to use the distance formula to find the distance between two points which is given by, say for points P(x1,x2) and Q(y1,y2) then

PQ = √(x2 – x1)2 + (y2 – y1)2

AB = √{((a – b) – (a + b))2 + ((a + b) – (a – b))2}

= √{(– 2b)2 + (2b)2}

= √{4b2 + 4b2}

= √8b2

AB = 2√2b units

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