Wednesday 19 June 2013

QUADRATIC - 2




If 4x2 – 20x + t is a perfect square, find t

Solution

a = 4, b = -20, c = t.

b2 = 4ac

(-20)2 = 4 x 4 x t

400 = 16t

400 = 16t
16      16
           
t = 25

Hence t = 25




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