Monday 23 March 2015

PERFECT SQUARES 1


If 16x2 + 40x + m is a perfect square, find m.

Solution

a = 16, b = 40, c = m.

b2 = 4ac

(40)2 = 4 x 16 x m

1600 = 64m

1600  =    64m
64          64
           
m = 25

Hence m = 25

TRY THIS................................


If 16x2 + 24x + Q is a perfect square, find Q.

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