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(x+5)(a-2) + (x+5)(a+1)


Răspuns :

[tex](x+5)(a-2)+(x+5)(a+1)= \\ =ax-2x+5a-10+ax+x+5a+5=2ax-x+10a-5[/tex]
[tex](x+5)(a-2)+(x+5)(a+1)=a(x+5)-2(x+5)+a(x+5)+(x+[/tex][tex]5)=ax+5a-2x-10+ax+5a+x+a=2ax+10a-x-5[/tex]