October 2018 1 20 Report
1.-efectuar: (2+x) (x+8)-(5+x)elevado a 2
2.-efectuar (x+5)elevado a 2 -(x-5)elevado a 2 -20x
3.-(xelevado a 2+4) (x+2)(x-2) -x elevado a 4

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