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Daca a=5si b+c=6,sa se afle: a )5a-10 ;b) 3b+3c, c)2*(a+3)-5 ; d) a+2b+2c , e) ab+ac , f) 3a+5*(2a-3) ,g ) 26-3*(a+1)+4b+4c-2a.​

Răspuns :

VioletaVyvy
a) 5a-10=5•5-10=10-10=0
b) 3b+3c=3(b+c)=3•6=18
c)2•(a+3)-5=2•8-5=16-5=11
d)a+2b+2c=a+2(b+c)=5+2•6=5+12=17
e)ab+ac=a(b+c)=5•6=30
f)3a+5•(2a-3)=3•5+5•(2•5-3)=15+35=50
g)26-3•(a+1)+4b+4c-2a=26-3•(5+1)+4(b+c)-2•5=26-18+24-10=22

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