Question

(x+2) +(x-2)²=
(3x+1)²+ (3x -1)²=
(3x+2)²+ (3x-2)²=
(2x+1)²+(x-3)²-6(x+2) (x-2)=
imi trebuie repede
plss

Answer 1

(3x+1)²+(3x-1)²=9x²+6x+1+9x²-6x+1=18x²+2
(3x+2)²+(3x-2)²=9x²+12x+4+9x²-12x+4=18x²+8
(2x+1)²+(x-3)²-6(x+2) (x-2)= 4x²+4x+1+x²-6x+9-6(x²-4)=5x²-2x+10-6x²+24=-x²-2x+34
si cum ai trecut tu nu ai nevoie de paranteze la prima
x+2+(x-2)²=x+2+x²-4x+4=x²-3x+6
sau ai uitat sa pui patratul deci 
(x+2)² +(x-2)²=x²+4x+4+x²-4x+4=2x²+8