Odpowiedź:
A proszę cię bardzo
zad 13
a) 5 • √8 = √25 • √8 = √25•8 = √200
b)
[tex]6 \times \sqrt{ \frac{5}{9} } = \sqrt{36} \times \sqrt{ \frac{5}{9} } = \sqrt{36 \times \frac{5}{9} } = \sqrt{20} [/tex]
c)
[tex] \frac{4}{5} \times \sqrt{50} = \sqrt{ \frac{16}{25} } \times \sqrt{50 } = \sqrt{ \frac{16}{25} \times 50 } = \sqrt{32} [/tex]
zad 14
a) 6+13+16= 35
b) 17-15-8= (-6)
zad 15
[tex] \sqrt{ \frac{36}{5} } \times \sqrt{5 } = \sqrt{ \frac{36}{5} \times 5 } = \sqrt{36} = 6[/tex]
zad 16
a) 6 - 2 = 4
b) (9 • 5) - (5 • 3) = 45-15 = 30
zad 17
[tex] \sqrt{45} = \sqrt{9 \times 5} = \sqrt{9} \times \sqrt{5} = 3 \sqrt{5} [/tex]
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