Respostas

2014-03-28T15:54:37-03:00
A) 3(2x+5)²+2x+5-1 = 3(4x²+20x+25)+2x+4 = 12x²+60x+75+2x+4 = 12x²+62x+79

b) 2(3x²+x-1)+5 = 6x²+2x-2+5 = 6x²+2x+3
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2014-03-28T15:56:58-03:00
A)f(x)= 6+x-1 = 5+x /x=-5 b) 2x+5 /x=5/2
1 1 1