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Question

If (3x4)(5x+7)=15x2ax28, then a is :



Your Answer
A

1

Correct Answer
B

- 1

Your Answer
C

- 2

Your Answer
D

None of these


Solution

The correct option is D

- 1


(3x4)(5x+7)=15x2ax28
15x2+x28=15x2ax28
x=ax
a=1
then a=1

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