Solve -a(b+2): Evaluating Expression When a=-5 and b=6

Solve the following expression:

−a⋅(b+2)= -a\cdot(b+2)=

If a=−5, b=6 a=-5,\text{ }b=6

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Place and calculate
00:05 We'll substitute appropriate values according to the given data, being careful with parentheses
00:17 Negative times negative always equals positive
00:23 Let's calculate the parentheses
00:26 Let's calculate the multiplication
00:29 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

Solve the following expression:

−a⋅(b+2)= -a\cdot(b+2)=

If a=−5, b=6 a=-5,\text{ }b=6

2

Step-by-step solution

Let's substitute the numbers into the formula:

−(−5)×(6+2)= -(-5)\times(6+2)=

Let's remember the rule:

−(−x)=+x -(-x)=+x

Let's write the exercise in the appropriate form:

5×(6+2)= 5\times(6+2)=

Let's solve the expression in parentheses:

6+2=8 6+2=8

We obtain the following exercise:

5×8= 5\times8=

Therefore, the answer is:

40 40

3

Final Answer

40 40

Practice Quiz

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What will be the sign of the result of the next exercise?

\( (-2)\cdot(-4)= \)

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