Question

Выполните 3 задания на листе.

Answer 1

1)a)$frac{3b}{2c}$

б)$frac{2}{b-9}$

в)$frac{7(x-y)}{(x-y)(x+y)}=frac{7}{x+y}$

2)а)$frac{(3b+7)b}{3b*b}-frac{3*b^2}{3*b^2}=frac{3b^2+7b-3b^2}{3b^2}=frac{7}{3b}$

б)$frac{4p-q}{(4p+q)(4p-q)}-frac{4p+q}{(4p-q)(4p+q)}=frac{4p-q-4p-q}{16p^2-q^2}=frac{-2q}{16p^2-q^2}=frac{2q}{q^2-16p^2}$

в)$frac{5-4y}{y(y-6)}+frac{4y}{y(y-6)}=frac{5-4y+4y}{y^2-6y}=frac{5}{y^2-6y}$

3)$frac{12p-q}{4p}-frac{3p*4p}{4p}}=frac{12p-q-12p}{4p}=frac{-q}{4p}=frac{-28}{-0,35*4}=20$

4)$frac{4*(25-y^2)}{y*(25-y^2)}-frac{2*y*(y+5)}{(y-5)y(y+5)}+frac{y*(2y+10)}{y*(25-y^2)}=frac{4(25-y^2)-2y^2-10y+2y^2+10y}{y(25-y^2)}=frac{4}{y}$