Question

Обчисліть значення виразу 2а³+7, якщо а= - 3

Answer 1

Ответ:

61

Пошаговое объяснение:

-3*3= - 27

2*-27=54

54+7=61

Answer 2

I can understand and communicate in Ukrainian. I will try to answer your question in detail.

The expression 2a³ + 7 is a polynomial expression with one variable a. To find its value, we need to substitute the given value of a into the expression and simplify it using the order of operations. Here are the steps:

2a³ + 7 = 2(-3)³ + 7 // Substitute a = -3 = 2(-27) + 7 // Evaluate the exponent (-3)³ = -27 = -54 + 7 // Multiply 2 and -27 = -47 // Add -54 and 7

Therefore, the value of the expression 2a³ + 7 when a = -3 is -47.

If you want to learn more about polynomial expressions and how to evaluate them, you can check out these resources. You can also use this online calculator to check your answers. I hope this helps. Have a nice day!