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AndreaAndrutsa
a fost răspuns

URGENTTT !
Efectuati calculele:
a) (x+2)²+(x-1)²
b)(x+3)²+(2x+1)²
c)(x-√2)²-(√2x+1)²
d)(√3+x)²-(√3x+2)²
e)2(x+√2)²-(√2x+1)²
f)(2x-1)²-4x(x+1)
g)(x-3)²-x(x-5)
h)(x-5)²-x(x+17)
i)(x+2)(x+3)-(x+1)²

Răspuns :

a) x²+4x+4+x²-2x+1=
   2x²+2x+5
b)x²+6x+9+4x²+4x+1=
  5x²+10x+10
c)x²-2√2x+2-2x²-2√2x+1=
  -x²-4√2x+3
d)3+2√3x+x²-3x²-4√3x-1=
   -2x²-2√3x+2
e)2x²+4√2x+4-2x²-2√2x-1=

2√2x+3
f)4x²-4x+1-4x²-4x=
 -8x+1
g)x²-6x+9-x²+5x=
  -x+9
h)x²-10x+25-x²-17x=
  -27x+25
i)x²+3x+2x+6-x²-2x-1=
 3x+5

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