Saturday 29 April 2017

ALGEBRA 6


If a2 – 20 = 61; find a.

solution

a2 = 61+ 20

a2 = 81

√a2 = √81    keep root sign on both sides

a = √81 
  
 a=9

Hence a = 9

TRY THIS………..


If a2 – 19 = 102; find a.

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