Find whether the trinomial is a perfect square or not :
16x2 - 16xy + y2
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Using the formula
[∵ (x - y)2 = x2- 2xy + y2 ]
Since, (16x2 - 16xy + y2) cannot be expressed as a2 - 2ab + b2.
Hence, 16x2 - 16xy + y2 is not a perfect square.
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4x2 + 4x + 1
9b2 + 12b + 16
x2 - 4x + 16
x3 - 4x is equal to:
x(x + 4) (x - 4)
x(x + 2) (x - 2)
(x + 4) (x - 4)
(x + 2) (x - 2)