Question

√9a^2 + √49b - a + √b

a. 2b + 8 √a

b. 2a - 8 √b

c. 2a + 8 √b

Answer 1

The correct answer:
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Step-by-step explanation:
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Assuming you mean:

" √(9a²) + (√49b) − a + √b " ;

Simplify the expression:
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Note that: " √(9a²) = 3a " ;

"√(49b) = 7√b " ;

And we write the expression

→ " 3a + 7√b − a + √b " ;

Combine the "like terms:

" + 3a − a = 2a " ;

" + 7√b + 1√b = 8√b " ;

Rewrite:
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" 2a + 8√b " ; which is: Answer choice: [C]: " 2a + 8√b " .
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