1) x^2 - 2x + 1 = (x - 1)(x - 1)
2) x^2 + 6x + 9 = (x + 3)(x + 3)
3) x^2 - 25 = x^2 - 5^2 = (x - 5)(x + 5)
4) 27a^3 + 8 = (3a)^3 + 2^3 = (3a + 2)(9a^2 - 6a + 4)
5) 16x^4 - 81 = (4x^2)^2 - (9)^2 = (4x^2 - 9)(4x^2 + 9) =
= (2x - 3)(2x + 3)(4x^2 + 9)
5√3 = √(5²*3) = √(25*3) = √75.
Ответ: √75.
1) 0,5x=2-y
x=(2-y):1/2
x=(2-y)*2
x=4-2y
2) 2x=3+y
x=(3+y)/2
1) х+16=32
х=32-16
х=16
2) 28+у=158
у=130
3)2з=76-34
з=17
4) 15у=75
у=7
5) 161х=322
х=2
6)7у=70
у=10
7)4х=130-70
4х=60
х=15
8)3х=15
х=5
9)9у=144
у= 16
10)8з=72
з=9
11)48-х=8
х= 40