Mathematics
Junior High
Solved
็ทๆฅ๐จ้ไธญๅผใไธ็ทใซ็ญใใๆใใฆๆฌฒใใใงใ๐ฟ
2
่ชฌๆใใฆใฟใใ
Q
a,
bใๆญฃใฎๆฐใฎใจใ,
Na+โโa+bใจ่จ็ฎใใฆใใใใงใใใใใ
abใๆฌกใฎๅคใฎใจใ,++6 ใฎๅคใๆฏในใฆใฟใพใใใใ
(1) a=9, b=16
(2)a=2,b=3
(8+2)=
โ ใง่ชฟในใใใจใใ ++b ่จ็ฎใใฆใใใใจใใใ
ใงใใใใใ
3)
= (1-3)
(-1)=-
ใฏใใใใใฏ,ๆญฃๆนๅฝขใใใใฆ่ชฟในใใใจใใฆใใพใใ ใใฎๅณใไฝฟใฃใฆ
Na+โโa + b ใจ่จ็ฎใใฆใใใใใฉใใ่ชฌๆใใฆใฟใพใใใใ
ใฏใใใใ
ใฎ่ใ/
2.
/3
2
3
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