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Question

Is -2 a solution of the linear equations 4x2=8 and 2x=4 ?


A

-2 satisfies only 4x-2=8

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B

-2 satisfies only 2x = -4

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C

-2 satisfies both 4x-2=8 and 2x = -4.

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D

x= -2 doesn't satisfy either of the equations

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Solution

The correct option is B

-2 satisfies only 2x = -4


Putting x= -2 in the two equations:

4x - 2 = 8:
LHS = 4 x -2 - 2 = -6 = RHS

2x = 4:
LHS = 2 x -2 = -4 = RHS

Hence, the solution x = -2 satisfies only 2x = -4


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