obten el producto notable
a) (x-3)(x+3)
b) (2x-6)(2x+6)
c) (6a2+3b)(3b-6a2)
a) (x-3)(x+3)
b) (2x-6)(2x+6)
c) (6a2+3b)(3b-6a2)
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Respuesta:
a): x²-9
b): 4x²-36
c): 9b²-144a²