Question

evalúa 3 + (a + 4)(8 − b) cuando a = 5 y b = 6. el valor de la expresión es ?.

Explanation:

Step1: Substitute a and b values

Substitute \( a = 5 \) and \( b = 6 \) into the expression \( 3+(a + 4)(8 - b) \).
We get \( 3+(5 + 4)(8 - 6) \).

Step2: Simplify inside parentheses

First, simplify the expressions inside the parentheses.
For \( 5 + 4 \), we have \( 5+4 = 9 \).
For \( 8 - 6 \), we have \( 8 - 6=2 \).
Now the expression becomes \( 3+(9)(2) \).

Step3: Perform multiplication and addition

First, multiply \( 9\times2 = 18 \).
Then, add \( 3+18 = 21 \).

Answer:

21