[x-4]=3
x=3+4 x=3-4
x=7 x=-1
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Упростить многочлен:<span><span><span>(<span>2xy−3<span>y2</span></span>)</span>2</span><span><span>(<span>2xy−3<span>y2</span></span>)</span>2</span></span>Решение:<span><span><span><span>(<span>2xy−3<span>y2</span></span>)</span>2</span>=</span><span><span><span>(<span>2xy−3<span>y2</span></span>)</span>2</span>=</span></span>Возведение в степень:<span><span>4<span>x2</span><span>y2</span>−12x<span>y3</span>+9<span>y4</span></span><span>4<span>x2</span><span>y2</span>−12x<span>y3</span>+9<span>y4</span></span></span>Ответ: <span>4<span>x2</span><span>y2</span>−12x<span>y3</span>+9<span>y<span>4</span></span></span>
№ 889 Разложите на множители
5x^2-5=5(x^2-1)
2a^2-8=2(a^2-4)
3an^2-27a=3a(n^2-9)
2xy^2-50x=2x(y^2-25)
x^3-9x=x(x^2-3)
3y^3-3y=3y(y^2-1)
2a^3-8a=2a(a^2-4)
40b-10b^3=10b(4-b^2)