Răspuns:
2.
c. 7x(x-5)-4x(x-8)-(radical 3x)²
7x²-35x-4x²+32x-3x²
6x²-3
b. (radical 3x)²-3(x+1)(x+2)+9x
3x²-3(x²+2x+x+2)+9x
3x²-3x²-6x²-3x-6+9x
6x²-6x-6
d. 5x(x-3)-3x(x-4)-(radical 2x)²
5x²-15x-3x²+12x-2x²
5x²-3x
