1/3 = 10/30 =100/300 = 1100/3300
0,3 = 3/10 = 9/30 = 90/300 = 990/3300
0,33 = 33/100 = 99/300 = 1089/3300
4/11 = 1200/3300
Ответ: 4/11; 1/3; 0,33; 0,3.
Решаем квадратное уравнение, D =49, корни +2 и -1/3.
<span>разлагается по формуле ax </span>2<span> <span>+ bx+ c = a </span></span><span>(<span> x – x</span></span>1 <span>) (<span> x – x</span></span>2 <span>)<span> .
</span></span><span>3x^2-5x-2 = 3(х +1/3) (х-2).</span>
Ученик (134)1. 11х=28х=28:11х=...2. 17х=55х=55:17х=...
X² + 3x + 2 = 0
D = 3² - 4 × 1 × 2 = 9 - 8 = 1, D>0
x1 = -3 + 1 / 2 × 1 = -3 + 1 / 2 = -1.
x2 = -3 - 1 / 2 × 1 = -4 / 2 = -2.
x1 = -1, x2 = -2.