Monday 5 December 2016

QUADRATICS 2


What must be added to x+ 5x to make the expression a perfect square?

Solution

a=1, b=5,c=?

b2 = 4ac

(5)2 = 4 x 1 x c

25 = 4c

25 = 4c
4      4

25/4 = c

Hence number to be added is 25/4.

TRY THIS……………………

NECTA 2013,  QN. 10a


What must be added to x+ 8x to make the expression a perfect square?   

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