Tuesday, 29 August 2017

ALGEBRA 5


If a2 – 20 = 61; find a.

SOLUTION
a2 – 20 = 61

a2 = 61+ 20

a2 = 81

√a2 = √81    keep root sign on both sides

a = √81   

 a = 9     since the square root of 81 is 9.

Hence a = 9

TRY THIS………..


If m2 – 23 = 98; find m.

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