👤
a fost răspuns

Formulele de calcul prescurtat la algebra (clasa a VII)

Răspuns :

(a+b)^(2)=a^(2)+b^(2)+2×a×b
(a-b)^(2)=a^(2)+b^(2)-2×a×b
(a+b+c)^(2)=a^(2)+b^(2)+c^(2)+2×a×b+2×b×c+2×a×c
(a+b)(a-b)=a^(2)-b^(2)
(a+b)^2=a^2+2ab+b^2
(a-b)^2=a^2-2ab+b^2
(a-b)(a+b)=a-b
(-a-b)^2=(a+b)^2
(-a+b)^2=(b-a)^2
(a+b+c)=a^2+b^2+c^2+2ab+2ac+2bc

Alte intrebari