a, \(=2ab+8a^2-b^2-4ab+2ab-6a^2=2a^2-b^2\)
b, \(=6a^2-9ab-4ab+6b^2-6a^2+6ab=6b^2+7ab\)
Đúng 1
Bình luận (0)
a, =2ab+8a2−b2−4ab+2ab−6a2=2a2−b2=2ab+8a2−b2−4ab+2ab−6a2=2a2−b2
b, =6a2−9ab−4ab+6b2−6a2+6ab=6b2+7ab
Đúng 0
Bình luận (0)
`a, = 2ab - b^2 + 8a^2 - 4ab + 2ab - 6a^2`
`= 2a^2 - b^2`
`b, 6a^2 - 4ab - 9ab + 6b^2 - 6a^2 + 6ab`
`= 6b^2 - 7ab`
Đúng 0
Bình luận (0)
