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1/2x + 3
1/2x - 4
-----------------
(1/2x)(1/2x) + 3(1/2x) - (1/2x)(4) - (4)(3)
x²/4 + 3x/2 - 4x/2 - 12 =
x²/4 + (3x - 4x)/2 - 12 =
x²/4 - x/2 - 12
Respuesta.
x²/4 - x/2 - 12
(1/2x + 3) * ( 1/2x -4)
=(1/2x*1/2x) + (1/2x*-4) + (3*1/2x) + (3*-4)
=1/4 x² - 4/2 x + 3/2 x -12
=x²/4 - x/2 -12
Saludos...........