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Daca a x b=15 si a x c=17, a(b+c) este .......

Răspuns :

a x b=15;a x c=17,a(b+c)=?
a(b+c)=a x b+a x c=15+17=32
[tex]a \cdot b=15 \\ a \cdot c=17 \\ a(b+c)=a \cdot b+a \cdot c=15+17=32 \\ \boxed{a(b+c)=32}[/tex]