phân tivhs đã thức thành nhân tử 9(x-2)^2-(y+3)^2 Question phân tivhs đã thức thành nhân tử 9(x-2)^2-(y+3)^2 in progress 0 Môn Toán Kiệt Gia 4 years 2020-10-30T01:45:32+00:00 2020-10-30T01:45:32+00:00 2 Answers 83 views 0
Answers ( )
Đáp án:
$9(x – 2)² – (y + 3)² $
$= [3(x – 2)]² – (y + 3)² $
$= (3x – 6)² – (y + 3)² $
$= (3x – 6 – y – 3)(3x – 6 + y + 3) $
$= (3x – y – 9)(3x + y – 3) $
`9(x-2)^2-(y+3)^2`
`=[3(x – 2)]² – (y + 3)²`
`= (3x – 6 – y – 3)(3x – 6 + y + 3)`
`= (3x – y – 9)(3x + y – 3)`
Học tốt !