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c)-2(radical 12 - radical 2)+ 5( radical3- radical8 ) -7(3 radical 3 +9 radical 2)=

Răspuns :

-2([tex]2 \sqrt{3} [/tex]-[tex] \sqrt{2} [/tex])+5([tex] \sqrt{3} [/tex]-2[tex] \sqrt{2} [/tex])-7(3[tex] \sqrt{3} [/tex]+9[tex] \sqrt{2} [/tex])=-4[tex] \sqrt{3} +2 \sqrt{2}+5 \sqrt{3}-10 \sqrt{2}-21 \sqrt{3}-63 \sqrt{2}=-71 \sqrt{2}-20 \sqrt{3} [/tex]