Question

15. What is the coefficient of 'a' when 9a^2+18a is divided by (a+2)?
A) 18 B) 9 C) 12 D) 2

Answer 1

Answer:

The answer is the option A

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Answer 2

The coefficient of a is 9.

Option B is correct.

Given:

• $9 {a}^{2} + 18a$
• $(a + 2)$

To find:

• What is the coefficient of 'a' when 9a^2+18a is divided by (a+2)?
• A) 18
• B) 9
• C) 12
• D) 2

Solution:

Divide 9a²+18a by a+2.

In division of polynomial, first term should be cancelled.

$a + 2 \: ) \: 9 {a}^{2} + 18a \: (9a \\ \: \: \: \: \: 9 {a}^{2} + 18a \\ ( - ) \: \: \: ( - ) \\ - - - - - - \\ 0 \\ - - - - - -$

The coefficient of a is 9.

Option B is correct.

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1) divide by polynomial 20x by 5x(by long division method).

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