Question

evalúa $3 + (a + 4)(8 - b)$ cuando $a = 5$ y $b = 6$.
el valor de la expresión es \boxed{}

Explanation:

Step1: Substitute \(a = 5\) and \(b = 6\) into the expression

First, substitute \(a = 5\) into \(a + 4\), we get \(5 + 4 = 9\). Then substitute \(b = 6\) into \(8 - b\), we get \(8 - 6 = 2\).

Step2: Calculate the product and then the sum

Now, calculate the product of \((a + 4)\) and \((8 - b)\) which is \(9\times2 = 18\). Then add 3 to this product: \(3 + 18 = 21\).

Answer:

21