A^2-2ab+5a-10b=a^2+5a-2ab-10b=a(a+5)-2b(a+5)=(a+5)(a-2b)
a^5+3a^3-8a^2-24=a^3(a^2+3)-8(a^2+3)=(a^2+3)(a^3-8)=(a^2+3)(a-2)(a^2+2a+4)
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x^3-y^3=(x-y)(x^2+xy+y^2)
<span>a^3-8=a^3-2^3=(a-2)(a^2+2a+4)</span>
(4b² + a²) / (a² - ab) = (4 + (a/b)²) / ((a/b)² - a/b)
Если a/b = 2, то
(4 + 2²) / (2² - 2) = 8 / 2 = 4
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Решение во вложении.......