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GM
NO.
DATE
3
√求值公式
(1) a²+b)=(a+b)²-2ab
7正負互換
=(a-b)²+2ab
(a+b)= = a2+2ab+b²
=aH
(a+b)=(a2-2ab+b
15)= a+b=8 ab=-2
151) = a-b = 4 ab = 5
a²+b² = 68
(8)+4
=64+4=68
(2)(a+b)²-ca-by²=4ab
(a+b)² + (a+b)²=>(a²+b²)
15) = (a+b)² = 18
118-6=12
a²+b=26
(4)²+10
= 16 +10 =26
Ca-5)² = 6 ab = 3
12=4=3
×2
24.
* (a+1)(a+1)(a²+1)(a++1)(a+1)=a® |
☆3×5×(4²+1)(44+1)(48+17=2h-1
(4-1)(4+1)
= 46 - 1
=(2+)16-1
=232-1
个
h=32
補充題型~
☆奇找和路
1+3+6 +19 = (1+19)² = 10'
1 +3 +5..... + 87 = (1+2h) * = 44*
:
2026.07.09 17:48