1) (8a^2 - 8ab - 5a + 5b = 8a(a-b) - 5(a-b) = (8a-5)(a-b))
Если (a = \frac{1}{8}, b = -\frac{3}{4}), то
((8*\frac{1}{8} - 5)(\frac{1}{8} -(-\frac{3}{4})) = (1-5)(\frac{1}{8} + \frac{6}{8}) = -4*\frac{7}{8} = -\frac{7}{2} = -3,5)
2) (10y^3 + y^2 + 10y + 1 = y^2(10y + 1) + (10y + 1) = (y^2+1)(10y+1))
Если (y = 0.3), то
((0.3^2 + 1)(10*0.3 + 1) = (0.09+1)(3+1) = (1.09)(4) = 4.36)