Respostas

2013-07-08T12:32:01-03:00
A) 2.(x^2+3x-2)-(2x^2-4)
=2x^2+6x-4-2x^2+4
=6x

b)(x^2+3x-2)(2x^2-4)
=2x^4+6x^3-4x^2-4x^2-12x+8
=2x^4+6x^3-8x^2-12x+8
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