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Question

What is the value of "a" if the value of the expression 3x2 + 6a+ 2 is 29 when x=1 ?


A

1

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B

2

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C

3

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D

4

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Solution

The correct option is D

4


3x2 + 6a+ 2 = 29

3×12 + 6a + 2 = 29

3×1 + 6a + 2 = 29

=> 3 + 6a + 2 = 29

=> 5 + 6a = 29

=> 6a = 24

=>a=246

=> a= 4


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