441.
а² - b² (a - b)(a + b)
a) = = a - b
a + b a + b
a - b a - b 1
б) = =
a² - b² (a - b)(a + b) a + b
4c² - 9x² (2c - 3x)(2c + 3x)
в) = = 2c + 3x
2c - 3x 2c - 3x
25 - x² (5 - x)(5 + x)
г) = = 5 + x
5 - x 5 - x
442.
8 - 3a -(3a - 8) 1
a) = = -
9a² - 64 (3a - 8)(3a + 8) 3a + 8
100 - 49b² (10 + 7b)(10 - 7b)
б) = = 10 - 7b
7b + 10 7b + 10
5у - у² y(5 - y) y
в) = =
25 - у² (5 - y)(5 + y) 5 + y
b² - c² (b - c)(b + c) (b - c)(b + c)
г) = = =
b⁴n - c⁴n n(b⁴ - c⁴) n(b² - c²)(b² + c²)
(b - c)(b + c) 1
= =
n(b - c)(b + c)(b² + c²) n(b² + c²)
5a³b + 5ab³ 5ab(a² + b²) 5ab 5ab
д) = = =
a⁴ - b⁴ (a² + b²)(a² - b²) a² - b² (a - b)(a + b)
9^(2x+5)-12^(2x+5)+3=0
-3+3=0
0=0