Solve the Multiplication Equation: Finding the Factor in 2 × ? = -8

Fill in the missing number:

2⋅?=−8 2\cdot?=-8

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find the unknown
00:05 Positive times negative always equals negative
00:09 Therefore the unknown is negative
00:12 Now let's find the unknown
00:18 This is the unknown, now let's add its sign
00:22 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Fill in the missing number:

2⋅?=−8 2\cdot?=-8

2

Step-by-step solution

Remember the following law:

(−x)×(+x)=−x (-x)\times(+x)=-x

Let's think about which number we need to multiply by 2 to get 8:

2×4=8 2\times4=8

Now let's put the numbers together with the appropriate sign as written in the law above as follows:

+2×(−4)=−8 +2\times(-4)=-8

3

Final Answer

−4 -4

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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