URGENT ! l'exercice 4 niveau 3ème

K = [tex]2 \sqrt{3} - 5\sqrt{3} + \sqrt{3} [/tex]
K =  [tex]-4 \sqrt{3} [/tex]

L = [tex]\sqrt{20} + \sqrt{45} - \sqrt{180} [/tex]
L = [tex]-\sqrt{5} [/tex]

H = [tex]2 \sqrt{3} * 6\sqrt{3}[/tex]
H = 36

I = [tex]2 \sqrt{5} * 4\sqrt{15}[/tex]
I = [tex]40\sqrt{3}[/tex]

J =  [tex](3 \sqrt{2})^{2} [/tex]
J = 18

M = [tex]3\sqrt{8} + \sqrt{32} - \sqrt{72} + 2\sqrt{128}[/tex]
M = [tex]20\sqrt{2}[/tex]