1. (a + b)2 = a + 2ab + b2
2. (a - b)2 = a2 - 2ab +b2
3. a2 + b2 = (a + b) - 2ab = (a - b) + 2ab
4. a - b = (a + b)(a - b)
chi nho 4 cai do thui bn co gi hoi mk co hinh anh ban hay dua mail cho mk nhe mk cho bn 13 hang dang thuc luon
xl em ko biết
because em ms lớp 1
1. ( A + B ) = A^2 + 2.A.B +B^2
2.(A - B ) = A^2 - 2.A.B +B^2
3. A^2 - B^2 = ( A + B ) . (A - B )
4. ( A + B ) ^3 = A^3 + 3A^2B + 3AB^2 +B^3
5. ( A - B ) ^3 = A^3 - 3A^2B + 3AB^2 +-B^3
6.A^3 + B^3 = (A + B) . (A^2 - AB +B^2 )
7. A^3 - B^3 = (A - B) . (A^2 - AB +B^2 )
(a + b)2 = a2 + ab + b2
(a - b)2 = a2 - ab + b2
a2 - b2 = (a - b)(a+ b)
(a + b)3 = a3 + 3a2b + 3ab2 + b3
(a - b)3 = a3 - 3a2b + 3ab2 - b3
a3 + b3 = (a + b)( a2 - ab + b2)
a3 - b3 = (a - b)(a2 + ab + b2)
\(\left(a+b\right)^2=a^2+2ab+b^2\)
\(\left(a-b\right)^2=a^2-2ab+b^2\)
\(a^3+b^3=\left(a+b\right)\left(a^2-ab+b^2\right)\)
\(a^2-b^2=\left(a-b\right)\left(a+b\right)\)
\(\left(a+b\right)^3=a^3+3a^2b+3ab^2+b^3\)
\(\left(a-b\right)^3=a^3-3a^2b+3ab^2-b^3\)
\(a^3-b^3=\left(a-b\right)\left(a^2+ab+b^2\right)\)
(a+b)2 =a2+2ab+b2
(a-b)2 =a2-2ab+b2
a2-b2=(a+b)(a-b)
(a+b)3=a3+3a2b+3ab2+b3
(a-b)3=a3-3a2b+ab2-b3
a3+b3=(a+b)(a2-ab+b2)
a3-b3=(a-b)(a2+ab+b2)
Xong rùi đó bn , nhớ k cho mình nha
