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Explain the error. What is the correct answer?
-7
Algebra
Chapter 1
An Introduction to Algebra
Section 7
Exponents and Order of Operations
The Language of Algebra
Equations and Inequalities
Functions
Linear Functions
Quadratic Functions
Polynomials
Missouri State University
Idaho State University
Lectures
01:32
In mathematics, the absolu…
01:11
00:49
Explain the error. What is…
01:41
What is the error in the p…
01:00
Describe the error in solv…
01:14
Describe the error.
01:37
00:43
01:05
Explain the error made in …
00:55
01:39
Describe and correct the e…
01:52
So we're being told that the student made a mistake. So we want to find a mistake, and then we want to actually go ahead and find the correct answer. Well, the student is being asked to evaluate the expression five plus three times the quantity of two minus six. So we can do this using the order of operations. Well, remember to do that, we first must evaluate our grouping symbols, which in this case would be to minus six, which is negative for which they did. So This first lines all set Well, Now, if you know this are two operations left, our addition and multiplication. Well, according to the order of operations, we should multiply three times negative for next. Ah, that's where this person made their mistake. They then added five plus three, which is how they got eight. That's where they went wrong. So let's go ahead and fix this. So if we have five plus three times negative four like we mentioned, we must do our multiplication next. So we're gonna bring down the five plus well three types. Sake of the four is negative 12 and five plus negative 12 is negative. Seven. So the correct answer should be
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