<u><em><span>ПОМОГИТЕ РЕШИТЬ!Хотя бы одно.</span></em></u>
<span>1.Пусть </span><span><span><span><span><span><span><span><span><span>x</span></span><span><span>1</span></span></span></span></span></span></span></span></span><span> и </span><span><span><span><span><span><span><span><span><span>x</span></span><span><span>2</span></span></span></span></span></span></span></span></span><span> — корни квадратного уравнения </span><span><span><span><span><span><span><span><span><span>x</span></span><span><span>2</span></span></span></span><span>–</span><span>3</span><span>x</span><span>–</span><span>5</span><span>=</span><span>0</span></span></span></span></span></span><span>. Найдите значение выражения </span><span><span><span><span><span><span><span><span><span>x</span></span><span><span><span><span>2</span></span></span></span><span><span>1</span></span></span></span><span><span><span><span>x</span></span><span><span>2</span></span></span></span><span>+</span><span><span><span><span>x</span></span><span><span>1</span></span></span></span><span><span><span><span>x</span></span><span><span><span><span>2</span></span></span></span><span><span>2</span></span></span></span></span></span></span></span></span><span>.</span>
<span>2.<span>Найдите наибольшее значение выражения</span></span>
<span><span><span><span><span><span>3</span><span>b</span><span>(</span><span>4</span><span>a</span><span>–</span><span>3</span><span>b</span><span>)</span><span>–</span><span>(</span><span>2</span><span>a</span><span>–</span><span>3</span><span>)</span><span>(</span><span>2</span><span>a</span><span>+</span><span>3</span><span>)</span><span>.</span></span></span></span></span></span><span><span><span><span><span><span>3.<span>Найдите сумму всех действительных корней уравнения </span><span><span><span><span><span><span><span><span><span>x</span></span><span><span>3</span></span></span></span><span>+</span><span>6</span><span><span><span><span>x</span></span><span><span>2</span></span></span></span><span>+</span><span>12</span><span>x</span><span>+</span><span>35</span><span>=</span><span>0</span></span></span></span></span></span><span>.</span></span></span></span></span></span></span><span><span><span><span><span><span><span>4.<span>Трое ребят принялись красить ватман каждый в свой цвет. Один закрасил красным 65% ватмана, другой зеленым 55%, третий синим 85%. Сколько процентов ватмана заведомо закрашено всеми тремя цветами?</span></span></span></span></span></span></span></span>
