Question

(30⋅b+15⋅a2)a−15⋅a, если a=90, b=9.

Answer 1

(30b + 15a²)a - 15a = (30 * 9 + 15 * 90²) * 90 - 15 * 90 =

= (270 + 15 * 8100) * 90 - 1350 = (270 + 121 500) * 90 - 1350 =

= 121 770 * 90 - 1350 = 10 959 300 - 1350 = 10 957 950

Answer 2

Ответ:

265950

Объяснение:

(30•9+15•90•2)•90-15•90=(270+2700)•90-1350=

=265950

Answer 3

To find the value of the expression (30⋅b + 15⋅a^2)a - 15⋅a when a = 90 and b = 9, we can simply substitute these values into the expression and perform the calculations:

(30⋅b + 15⋅a^2)a - 15⋅a

Substitute a = 90 and b = 9:

(30⋅9 + 15⋅90^2)⋅90 - 15⋅90

Now, let's calculate each part step-by-step:

1. 30⋅9 = 270
2. 90^2 = 90 * 90 = 8100
3. 15⋅8100 = 121,500
4. (270 + 121,500)⋅90 = 121,770⋅90 = 10,959,300
5. 15⋅90 = 1350

Finally, we subtract 1350 from 10,959,300:

10,959,300 - 1350 = 10,957,950

So, the value of the expression (30⋅b + 15⋅a^2)a - 15⋅a when a = 90 and b = 9 is 10,957,950.