Zadanie 48 strona 17
Wyłącz czynnik przed znak pierwiastka i zapisz w jak najprostszej postaci:
a) √20 + √45 = d) ∛40 + ∛5000 =
b) √8 - √200 = e) ∛128 - ∛54 =
c) - √75 + √27 = f) - ∛0,004 + ∛32 =
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a)√20+√45=2√5+3√5=5√5
b)√8-√200=2√2-10√2=-8√2
c)-√75+√27=-5√3+3√3= -2√3
d)∛40+∛5000=2∛5+10∛5=12∛5
e)∛128- ∛54 =4∛2 -3∛2= ∛2
f)-∛0,004 + ∛32=- 0,1∛4+ 2∛4 =1,9∛4
a) √20 + √45 = √4*5 + √5*9 = 2√5 + 3√5 = 5√5
b) √8 - √200 = √4*2 - √2*100 = 2√2 - 10√2 = -8√2
c) - √75 + √27 =-√3*25+√3*9 = -5√3+3√3 = -2√3
d) ∛40 + ∛5000 = ∛5*8 + ∛1000*5 = 2∛5+10∛5 = 12∛5
e) ∛128 - ∛54 = ∛2*64 -∛27*2 = 4∛2-3∛2 = ∛2
f) - ∛0,004 + ∛32 = -∛0,001*4 + ∛8*4 = -0,1∛4 + 2∛4 = 1,9∛4