a)
[tex](4 - \sqrt{2} ) {}^{2} = \\ = {4}^{2} - 2 \times 4 \times \sqrt{2} + \sqrt{2} {}^{2} = \\ = 16 - 8 \sqrt{2} + 2 =\\= 18 - 8\sqrt{2} [/tex]
b)
[tex](2 \sqrt{3} + 1) {}^{2} = \\ =( 2 \sqrt{3} ) {}^{2} + 2 \times1 \times 2 \sqrt{3} + {1}^{2} = \\ = 4 \times 3 + 4 \sqrt{3} + 1 = 12 + 4\sqrt{3} + 1 =\\= 13 + 4 \sqrt{3} [/tex]
PENTRU A REZOLVA FOLOSIM FORMULELE:
[tex](a + b) {}^{2} = a {}^{2} + 2ab + {b}^{2} \\ \\ (a - b) {}^{2} = {a}^{2} - 2ab + {b}^{2} [/tex]
…ᘛ⁐̤ᕐᐷฅ^•ﻌ•^ฅฅ^•ﻌ•^ฅ
