Răspunsuri

2014-11-11T19:13:32+02:00
(a+b+2)²= a²+b²+4+2ab+4a+4b
b) (x²-2x-2)²=x⁴+4x²+4-4x³-4x²+8x
c)(-√5+√2-√3)²=5+2+3-2√10-2√6+2√15
d)(x+2)³=x³+8+6x²+24x
e)(2x+3)³=8x³+27+18x²+54x
f)(-3a+4)³= -9a³+64+27a²-36a
g)(5x+3y)³=125x³+27y³+45y²x+225x²y


trebuie sa stii formulele de calcul prescurtat!