Решение
2.
a) (a - 3)/4a² + 3/2a = (a - 3 + 6a)/(4a²) = (7a - 3)/(4a²)
б) (x³ - 1)/9x³ - (x² - 4)/(12x²) - 2 =
= (4x³ - 4 - 3x³ + 12x - 72x³)/(36x³) = (- 71x³ + 12x - 4)/(36x³)
A). (6b-c)^2=36b^2-12bc+c^2; b). (p-1/3q)(p+1/3q)=p^2-1/9q^2.
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D=√(m²-4*k*n)
x=(-m+-√(m²-4*k*n))/2k
Ответ 4