1/2√10²*3 - 4√1/4²*3 - √5²*3 = 1/2*10√3 - 4*1/4√3 - 5√3 = 5√3-√3-5√3 = -√3
(3√2-1)(2√2+2)=12-2√2+6√2-2=10+4√2
3+4+2+3 = 12
5+7+6=18
12\100 = 0.12
18\0.12 = 150
150-100 = 50%
№7. Нужно добавить 10:
m^2 - 6m + 9 = (m-3)^2
№9. (5x - 3)^2 = (5x+4)^2
25x^2 - 15x + 9 = 25x^2 + 40x + 16
- 55x = 5
x = - 5/55
x = - 1/11
НОД(40 и 60) = 120 а НОК(40 и 60)=20