Question

Calculati a) x(x la a doua-2 )-4(x+1)+3(x-2)-x la a treia
b)(radical din 3 +radical din 2)(radical din 3-radical din 2)-(radical din 3+1)la a doua+2radicaldin3

Answer 1

$x {}^{3} - 2x - 4x - 4 + 3x - 6 - x {}^{3} = - 3x - 10$

$( \sqrt{3} + \sqrt{2} )( \sqrt{3} - \sqrt{2} ) - (3 + 2 \sqrt{3} + 1) + 2 \sqrt{3} = ( \sqrt{3} + \sqrt{2} )( \sqrt{3} - \sqrt{2} ) - (4 + 2 \sqrt{3}) + 2 \sqrt{3} =( \sqrt{3} + \sqrt{2} )( \sqrt{3} - \sqrt{2} ) - 4 - 2 \sqrt{3} + 2 \sqrt{3} = 3 - 2 - 4 = - 3$