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1-2x{-20x[15x(-7)-24x(-4)]}+2x{-8x[-30-2x(-5)]}=?
va rog ajutati-ma!!!

Răspuns :

Cristinatibulca
1-2x{-20x[15x(-7)-24x(-4)]}+2x{-8x[-30-2x(-5)]}=
1-2x{-20X[-105+96]}+2x{-8x[-30+10]}=
1-2x[-20x(-9)]+2x[-8x(-20)]=
1-2x180+2x160=1-360+320=-39

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