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Subtraction of Polynomials

Subtract the ...

Question

Subtract the second polynomial from the first :

$2 a + 3 a^{2} - 7; 3 a^{2} - 12 + 2 a$

A

a

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B

8

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C

5

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D

0

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Solution

The correct option is C 5
$(2 a + 3 a^{2} - 7) - (3 a^{2} - 12 + 2 a)$

$= 2 a + 3 a^{2} - 7 - 3 a^{2} + 12 - 2 a$
$= 5$

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