во столько же раз увеличиться и площадь
<span>16а^3 - а^5=а³(16-а²)=а³(4-а)(4+а)</span>
78 13/48 - (47 - 3/16 + 51 5/6 - 26 3/8) + (7/30 + 13/30) = 6 2/3
1) 47 - 3/16 = 46 16/16 - 3/16 = 46 13/16
2) 46 13/16 + 51 5/6 = 46 39/48 + 51 40/48 = 97 79/48 = 98 31/48
3) 98 31/48 - 26 3/8 = 98 31/48 - 26 18/48 = 72 13/48
4) 7/30 + 13/30 = 20/30 = 2/3
5) 78 13/48 - 72 13/48 = 6
6) 6 + 2/3 = 6 целых 2/3
(10d^2-20d+d-2)(3d-10)=30d^3-60d^2+3d^2-6d-100d^2+200d-10d+20=30d^3-157d^2+184d+20