Zadanie 1
log_51=x\\5^x=1\\5^x=1^0\\x=0\\log_51=0
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log_55=x\\ 5^x=5\\5^x=5^1\\x=1\\ log_55=1
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2log_51+5log_55=2\cdot 0+5\cdot 1 =5
Zadanie 2
(a+b)^2=a^2+2ab+b^2 wzór skróconego mnożenia
(3+4\sqrt2)^2=3^2+2\cdot 3 \cdot 4\sqrt2+(4\sqrt2)^2=9+24\sqrt2+16\cdot 2 = 41+24\sqrt2