Question

(5-2√3)²
понпонё12ё23ё

Answer 1

$(5 - 2 \sqrt{3} ) {}^{2} = 5 {}^{2 } + - 2 \times 5 \times 2 \sqrt{3} + (2 \sqrt{3}) {}^{2} = 25 - 20 \sqrt{3} + 12 = 37 - 20 \sqrt{3}$