Ответ:
Объяснение:
1)a^2+2√3a+3a+a√3a+3a+9+√3a
(a+√3a)^2+a√3a+3a+9+√3a
(a+3a)^2+√3a(a+1)+3(a+1)
(a+3a)^2+(√3a+3)(a+1)
2)х^2+2x+1+3x^2-2x√2x-√2x
(x+1)^2 + 3x^2 - x√2x - √2x(x+1)
(x+1)^2 + 3x^2 - √2x(x+1) - √2x(x+1)
(x+1)^2 + 3x^2 - √2x(x+1)^2
(1-√2x)(x+1)^2 + 3x^2
А)<span><span>(<span><span>x2</span>+x</span>)</span><span>(<span>49−<span>x2</span></span>)</span>=</span>Раскрытие скобок:<span><span>x2</span>49+<span>x4</span><span>(<span>−1</span>)</span>+x49+<span>x3</span><span>(<span>−1</span>)</span>=</span><span>49<span>x2</span>−<span>x4</span>+49x−<span>x3</span>=</span><span>−<span>x4</span>−<span>x3</span>+49<span>x2</span>+49x</span>Ответ: <span>−<span>x4</span>−<span>x3</span>+49<span>x2</span>+49x
В)</span><span><span>(<span><span>x2</span>−7</span>)</span><span>(<span><span>x2</span>+18</span>)</span>=</span>Раскрытие скобок:<span><span>x4</span>+<span>x2</span>18−7<span>x2</span>−126=</span><span><span>x4</span>+11<span>x2</span>−126</span>Ответ: <span><span>x4</span>+11<span>x2</span>−126
Д)</span><span><span>(<span><span>x2</span>−3<span>x2</span></span>)</span><span>(<span><span>x2</span>+7</span>)</span>=</span>Приведение подобных:<span><span>(<span>−2<span>x2</span></span>)</span><span>(<span><span>x2</span>+7</span>)</span>=</span>Раскрытие скобок:<span>−2<span>x4</span>−14<span>x2</span></span>Ответ: <span><span>−2<span>x4</span>−14<span>x2
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218000000=2,18*10^8 вроде но ты ещё с другими сверься
Получится три/восемнадцатых сокращаем-одна/вторая
х=Любому отрицательному числу.