[latex] \frac{2* \sqrt{2+x}}{15} [/latex]  при x=-1.19[latex] \frac{a-b}{a+b} - \frac{a+b}{a-b} [/latex][latex] \frac{1}{a} - \sqrt{c} [/latex]  при a=0.04 и c=0.64

1. (2*√(2-1.19) ) \ 15 = 2* √0.01 \ 15 = 2*0.1 \ 15 = 0.2 \ 15 = 1\5 * 1\15 =1\75 2. ( (а-в)² - (а+в)² ) \ (а-в)(а+в) = ( а²-2ав+в² - а² - 2ав -в²) \ (а² - в²) = -4ав \ (а²-в²) 3. 1\0.04 - √ 0.64 = 25 - 0.8 = 24. 2

[latex]1) \frac{2* \sqrt{2-1.19} }{15} = \frac{2* \sqrt{0.81} }{15} = \frac{2*0.9}{15} = \frac{1.8}{15} =0.12 \\ \\ 2) \frac{a-b}{a+b} - \frac{a+b}{a-b} = \frac{(a-b)(a-b)-(a+b)(a+b)}{a ^{2} -b ^{2} } = \frac{a ^{2} +b ^{2} -2ab- a^{2} -b ^{2} -2ab}{a ^{2} -b ^{2} } = \\ =- \frac{4ab}{a ^{2} -b ^{2} } \\ \\ 3) \frac{1}{0.04} - \sqrt{0.64} =25-0.8=24.2[/latex]