Question

Calculati si stabiliti care dintre numerele a si b este mai mare
a=18x19+20x21-22x23+2x[15+3x(40²-39²)]
b=2013x2012+2013x2011-2013x2022+7x[9+2x53²-52²)]
2.Cat ne da 124+67¹²+11

Answer 1

a=18x19+20x21-22x23+2x[15+3x(40²-39²)]=
=342+420-506+2x[15+3x(1600-1521)]=
=256+2x(15+3x79)=
=256+2x(15+237)=
=256+2x252=
=256+504=
=760

b=2013x2012+2013x2011-2013x2022+7x[9+2x(53²-52²)]=
=2013(2012+2011-2022)+7x[9+2x(2809-2704)]=
=2013x2001+7x(9+2x105)=
=4028013+7x(9+210)=
=4028013+7x219=
=4028013+1533=
=4026480