PERFECT SQUARES-1

If 9x² – 12x + e is a perfect square, find e.

Solution

a = 9, b = -12, c = e.

b² = 4ac

(-12)² = 4 x 9 x e

144 = 36e

144 = 36e

 36      36

           

e = 4

Hence t = 4

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If 9x² – 12x + e is a perfect square, find e