Toán Lớp 6: Tìm các cặp số nguyên ( x, y ) sao cho:
( 2x + 1 ) ( y – 3 ) = -7
nhanh giúp em vs ạ
Leave a reply
Register Now
Login
Lost Password
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Toán Lớp 6: Tìm các cặp số nguyên ( x, y ) sao cho:
( 2x + 1 ) ( y – 3 ) = -7
nhanh giúp em vs ạ
Comments ( 2 )
⇒ – 7 = 1 . ( – 7 )
= ( – 7 ) . 1
= ( – 1 ) . 7
= 7 . ( – 1 )
TH 1 :
( 2x + 1 ) = 1 ⇒ x = 0
( y – 3 ) = -7 ⇒ y = – 4
( 2x + 1 ) = – 7 ⇒ x = – 4
( y – 3 ) = 1 ⇒ y = 4
( 2x + 1 ) = – 1 ⇒ x = – 1
( y – 3 ) = 7 ⇒ y = 10
( 2x + 1 ) = 7 ⇒ x = 3
( y – 3 ) = – 1 ⇒ y = 2
Xin hay nhất
⇒ – 7 = 1 . ( – 7 )
= ( – 7 ) . 1
= ( – 1 ) . 7
= 7 . ( – 1 )
TH 1 :
( 2x + 1 ) = 1 ⇒ x = 0
( y – 3 ) = -7 ⇒ y = – 4
( 2x + 1 ) = – 7 ⇒ x = – 4
( y – 3 ) = 1 ⇒ y = 4
( 2x + 1 ) = – 1 ⇒ x = – 1
( y – 3 ) = 7 ⇒ y = 10
( 2x + 1 ) = 7 ⇒ x = 3
( y – 3 ) = – 1 ⇒ y = 2