Question

1)9²-5² = 2) (8² +23³): (81-72) = 3) 2а²-13, якщо a=6, а=10Пж помогите умоляюю​

Answer 1

Ответ:

Пошаговое объяснение:

1)9²-5²= 9*9-5*5=81-25=56

2)(8² +23³): (81-72=(64+12167):9= 12231:9=1359

3)2а²-13, если а=6, то:

2*$6^{2}$-13= 72-13=59

если а=10, то:

2*$10^{2}$-13=200-13=187

Answer 2

Ответ:

Ответы выделены жирным шрифтом.

Пошаговое объяснение:

1) 9² - 5² = 81 - 25 = 56

2) (8² + 23³) : (81-72) = (64 + 12167) : 9 = 12231 / 9 = 1359

3) 1) 2a² - 13 при a = 6

2 * 36 - 13 = 72 - 13 = 59

2) 2a² - 13 при a = 10

2 * 100 - 13 = 200 - 13  = 187

Answer 3

1. To solve the expression 9² - 5², we first need to calculate the squares of 9 and 5 separately.

9² = 9 * 9 = 81 5² = 5 * 5 = 25

Now we can substitute these values into the expression:

9² - 5² = 81 - 25 = 56

Therefore, 9² - 5² equals 56.

2. Let's solve the expression (8² + 23³) / (81 - 72). We'll calculate the squares and cubes first.

8² = 8 * 8 = 64 23³ = 23 * 23 * 23 = 12167

Now we can substitute these values into the expression:

(8² + 23³) / (81 - 72) = (64 + 12167) / (81 - 72) = 12231 / 9 = 1359

Therefore, (8² + 23³) / (81 - 72) equals 1359.

3. The expression 2a² - 13 needs to be evaluated for two different values of a, which are a = 6 and a = 10.

For a = 6: 2a² - 13 = 2 * 6² - 13 = 2 * 36 - 13 = 72 - 13 = 59

Therefore, when a = 6, 2a² - 13 equals 59.

For a = 10: 2a² - 13 = 2 * 10² - 13 = 2 * 100 - 13 = 200 - 13 = 187

Therefore, when a = 10, 2a² - 13 equals 187.