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Which expression is equivalent to 7a - 8 - 12a + 4
1. 9a
2. 31a
3. 19a + 12
4. -5a - 4

Sagot :

VectorFundament120

Answer:

-5a - 4

Step-by-step explanation:

Hey there! To evaluate [tex]\displaystyle \large{7a-8-12a+4}[/tex], we can do by adding up/subtracting like-terms.

Like-terms are terms that have same appearance. It must also have same degree, power and everything to be considered as like-terms.

From our expression, rearrange the terms.

[tex]\displaystyle \large{7a-12a-8+4}[/tex] , then we combine [tex]\displaystyle \large{7a-12a = -5a}[/tex] and [tex]\displaystyle \large{-8+4 = -4}[/tex]

That leaves us with [tex]\displaystyle \large{\bold{-5a-4}}[/tex]

If you have any questions regarding polynomial operation, you can always let me know in the comment!

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