โจ Best Answer โจ
ๅใใ ใฃใใใ็ญใๆธใใพใใ้้ใฃใฆใใใใใใชใใ
Mathematics
Junior High
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่ณๆฅใงใ๐ฆ๐ฆ๐ฆ๐ฆ๐ฆ๐ฆ
ใฉใชใใใ้กใใใพใ๐ฟ๐ฟ
็ฐกๅใช่งฃ่ชฌใชใฉใใใจ็่งฃใใใใใฎใงไฝ่ฃใใใฐใ้กใใใใใงใโฆโฆโฆโฆโฆโฆ
(2) ใฐใฉใใใ็น(9, -5)ใ้ใ, ฮฑใ6ๅขใใใจyใ2ๆธใ็ด็ทใงใใใ
(3) ใฐใฉใใใ2็น(-1,2), (2,3)ใ้ใ็ด็ทใงใใใ
Answers
Answers
(3)ใฏ้ฃ็ซๆน็จๅผใไฝใฃใฆใใใใจๆฑใใใพใใ๏ผ
2=๏ผ1a+bโฆโ
3=2a+bโฆโก
ใพใๅใใใชใใฃใใๆฐ่ปฝใซ่ใใฆใใ ใใใญ๐ฅฐ
(2)ใฏใใใใชใใงใ๐ฆ
ใชใใปใฉ๏ผ่งฃใใพใใใใใใจใใใใใพใ๐ฟ
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