3456789

3456789

kinh ghê

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mik hok lớp 8 cái này của 12 mik chưa trả lời đc bạn thông cảm nha !

xàm xí cái này cuar lớp 12 tao chết liền

đáp số -20

bằng 3 nhé

=2 nha bn

Trận chiến cuối cùng   (phải ko)

Chiến thắng quyết định của Liên minh Kết thúc Liên minh thứ bảy Thất bại chung cuộc của Napoleon Kết thúc những cuộc chiến tranh của Napoleon.

@Mina

Xin t i c k ạ!

\(\left(a+b+c\right)^2=a^2+b^2+c^2+2ab+2bc+2ac\)

\(\Rightarrow\left(ab+bc+ac\right)=\frac{\left(a+b+c\right)^2-\left(a^2+b^2+c^2\right)}{2}=\frac{6^2-14}{2}=11\)

\(a^3+b^3+c^3-3abc=\left(a+b+c\right)\left(a^2+b^2+c^2-ab-bc-ac\right)\)

\(\Rightarrow abc=\frac{\left(a^3+b^3+c^3\right)-\left(a+b+c\right)\left(a^2+b^2+c^2-ab-bc-ac\right)}{3}=\)

\(=\frac{36-6\left(14-11\right)}{3}=6\)

E=8. K cho mk nhé, nếu mk đúng

Không thể nào mà biết được.