Răspunsuri

2014-09-28T16:44:36+03:00
A)=9x²+3x+3x+1-(x²+3x+3x+9)=9x²+6x+1-x²-6x-9=8x²-8=8(x²-1)
b)=3x²+30x+25-(x²+2x+1)=3x²+30x+25-x²-2x-1=2x²+28x+24=2(x²+14x+12)
c)=x²+2√2x+2-8=x²+2√2x-6
d)=(a³-b³)(a³+b³)
e)=2x-2√2x+1-32x²=-32x²+2x(1-√2)+1
f)=x²-2√3x+3-(y²-4√3y+4·3)=x²-2√3x+3-y²+4√3y-12=
(x²-y²)-2√3(x-2y)-9
g)=7a(2-7a)+(10b-1)(10b+1)