Solve Expression a·b+1 When a=2 and b=-2: Step-by-Step

Question

$a\cdot b+1=$

Replace and calculate if $a=2,b=-2$

00:00 Place and calculate

00:04 Let's substitute appropriate values according to the given data, being careful with parentheses

00:19 Positive times negative is always negative

00:23 Let's continue solving according to the correct order of operations

00:27 And this is the solution to the question

Let's begin by inserting the given data into the formula:

$2\times(-2)+1=$

Remembering the rule:

$(+x)\times(-x)=-x$

Let's now solve the multiplication operation:

$2\times(-2)=-4$

In order to obtain the following expression:

$-4+1=$

Therefore, the answer is:

$-3$

$-3$