Если 1:1/5-1/30, то 4 и 29/30
X (4x + 11) - 7 (x² - 5x) = - 3x (x + 3)
4x² + 11x - 7x² + 35x = - 3x² - 9x
- 3x² + 3x² + 46x = - 9x
46x + 9x = 0
55x = 0
x = 0
10ab+(-5a+b)² = 10ab +(b-5a)² = 10ab+ b² -10ab +25a² = b²+25a²
при a=√10 и b=√5 b²+25a²=(√5)²+25(√10)² = 5+25*10 =5+250=255
1.5х-2=4-0.5х
1.5х+0.5х=4+2
2х=6
х=3
у=1.5*3-2=2.5