Question

4. Спрости вираз 3(2 - c) - 4(c + 3) та обчисли його значення, якщо c = - 5 .​

Answer 1

Ответ:

29

Пошаговое объяснение:

3(2 - c) - 4(c + 3)=6-3с-4с-12=-7с-6=-7*(-5)-6=35-6=29

Answer 2

Ответ:

29

Пошаговое объяснение:

Упростим выражение. Раскроем скобки, используя распределительные законы умножения а(b±c)=ab±ac, приведем подобные члены.

$3(2 - c) - 4(c + 3) = 6 - 3c - 4c - 12 = - 6 - 7c.$

Подставим при с = - 5 :

$- 6 - 7 \cdot( - 5) = - 6 + 35 = 35 - 6 = 29.$

Answer 3

Expression Evaluation

To evaluate the expression 3(2 - c) - 4(c + 3), we need to substitute the value of c and perform the necessary calculations. In this case, we are given that c = -5.

Let's substitute c = -5 into the expression and calculate its value:

3(2 - (-5)) - 4((-5) + 3)

Simplifying the expression inside the parentheses:

3(2 + 5) - 4((-5) + 3)

Performing the addition and subtraction within the parentheses:

3(7) - 4((-2))

Simplifying further:

21 - (-8)

To subtract a negative number, we can rewrite it as addition:

21 + 8

Finally, performing the addition:

29

Therefore, the value of the expression 3(2 - c) - 4(c + 3), when c = -5, is 29.

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