A)
1) 2m+1 - 2m-1 = (2m+1)² - (2m-1)² = 4m²+4m+1-4m²+4m-1 =
2m-1 2m+1 (2m-1)(2m+1) (2m-1)(2m+1)
= 8m
(2m-1)(2m+1)
2) 8m : 4m = 8m * 5(2m-1) =
(2m-1)(2m+1) 10m-5 (2m-1)(2m+1) 4m
= 2*5 = 10
2m+1 2m+1
Ответ: 10
2m+1
б)
1) x+3 + x-3 = (x+3)² +(x-3)² = x²+6x+9+x²-6x+9 = 2x² +18 =
x-3 x+3 (x-3)(x+3) (x-3)(x+3) (x-3)(x+3)
= 2(x²+9)
(x-3)(x+3)
2) x+3 * 2(x²+9) = 2
x²+9 (x-3)(x+3) x-3
Ответ: 2
x-3