41.5. 1) (a² - 25)/(a + 3) : 1/(a² + 5a) - (a + 5)/(a² - 3a) при 1) a = 2; 2) a = -4;

1. Упростим выражение:
(a-5)(a+5)/(a+3) * a(a+5)/(a+5) - (a+5)/a(a-3) = a(a-5) - (a+5)/a(a-3)
2. При a = 2: 2(2-5) - (2+5)/(2(2-3)) = 2(-3) - 7/(2(-1)) = -6 - (-3.5) = -2.5
3. При a = -4: -4(-4-5) - (-4+5)/(-4(-4-3)) = -4(-9) - 1/(-4(-7)) = 36 - 1/28 = 36 - 0.0357 = 35.9643