can you please explain me the sinosodial method to solve the inequality

can you please explain me the sinosodial method to solve the inequality


1 Answers

Aman Bansal
592 Points
11 years ago

Dear Rahul,

Take the example


-2 < (6-2x)/3 < 4

First, let us clear out the "/3" by multiplying each part by 3:

Because you are multiplying by a positive number, the inequalities will not change.

-6 < 6-2x < 12

Now subtract 6 from each part:

-12 < -2x < 6

Now multiply each part by -(1/2).

Because you are multiplying by a negative number, the inequalities change direction.


> x > -3


And that is the solution!

But to be neat it is better to have the smaller number on the left, larger on the right. So let us swap them over (and make sure the inequalities point correctly):

-3 < x < 6

Best Of luck

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Aman Bansal

Askiitian Expert

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