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Pentru a=50 calculati a*(a+2)-a*(a-2)

Răspuns :

Mtmc
50*(50+2)-50*(50-2)=200
1)50+2=52
2)50-2=48
3)50*52=2600
4)50*48=2400
5)2600-2400=200
[tex]a(a+2)-a(a-2)=? \\ a=50 \\ a(a+2)-a(a-2)=50(50+2)-50(50-2)= \\ =50 \cdot 52-50 \cdot 48=2600-2400=200[/tex]

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