Answer: The answer is: [C]:
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" 4 √7 " .
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Step-by-step explanation:
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5 √7 + √7 - 2 √7 ;
= 5 √7 + 1 √7 - 2 √7 = ?? ;
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Let's regard: " √7 " ; as a variable.
Let's substitute "a" for " √7 " ; and rewrite
the expression:
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5a + 1a - 2a ; Now, simplify"
= ( 5a + 1a) - 2a ;
= (6a) - 2a ;
= 6a - 2a ;
= 4a ;
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Now, let's replace the "a" ; with " √7 " ; and rewrite as:
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" 4 √7 " .
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→ which is: Answer choice: [C]: " 4 √7 " .
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Step-by-step explanation:
5 √7 + √7 - 2 √7 ;
= 5 √7 + 1 √7 - 2 √7 = ?? ;
___________________________________________
Let's regard: " √7 " ; as a variable.
Let's substitute "a" for " √7 " ; and rewrite
the expression:
___________________________________________
5a + 1a - 2a ; Now, simplify"
= ( 5a + 1a) - 2a ;
= (6a) - 2a ;
= 6a - 2a ;
= 4a ;
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Now, let's replace the "a" ; with " √7 " ; and rewrite as:
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→ " 4 √7 " .
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→ which is: " Answer choice: [C]: " 4 √7 " .
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Hope this answer—and explanation—is helpful to you!
Best wishes to you in your academic pursuits
— and within the "Brainly" community!
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