4.
[tex]a) 4 \sqrt{3} \\b) x {}^{2} + {4}^{2} = {7}^{2} \\ {x}^{2} + 16 = 49 \\ x = \sqrt{33} [/tex]
5.
[tex]a) \: a \: = 5 \sqrt{2} \: \: | \times \sqrt{2} \\ a \sqrt{2} = 10 \\ b) \: \frac{3 \sqrt{3} }{3} \times 2 = 2 \sqrt{3} \\ 2 \sqrt{3} \times 2 = 4 \sqrt{3} [/tex]
Proszę o naj
