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3 years ago

Solve the inequality 2x - 3 Need help.... plz

Mathematics

2 answers:

timama [110]3 years ago

6 0

2x - 3 = 0
2x = 0 + 3
2x = 3
X = 3/2 , 1.5

-BARSIC- [3]3 years ago

5 0

Answer:

x=3/2

Step-by-step explanation:

2x-3=0

2x=0+3

2x=3

x=3/2

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Answer:

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Step-by-step explanation:

So, lets start by simplifying the expressions

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2 years ago

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uysha [10]

Answer:

See detail below.

Step-by-step explanation:

A word of caution before getting to the actual problem: I believe there is an important set of brackets missing in the original post. The expression on the left hand side should be:

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Without the brackets, it is left unclear whether the denominator is just tanx or tanx+2. I recommend to use brackets wherever any doubt could arise.

Now to the actual problem: \we can make the following transformations on the left hand side:

$\frac{\cos x \tan x + 2\cos x -2}{\tan x +2}=\frac{\cos x \frac{\sin x}{\cos x} + 2\cos x -2}{\frac{\sin x +2\sin x}{\cos x} }=\\=\frac{\cos x \sin x - \sin x + 2\cos^2 x - 2\cos x}{\sin x + 2\cos x}=\\=\frac{\cos x \sin x +2\cos^2 x }{\sin x + 2\cos x}-1=\\=\cos x -1$

which is shown to be the same as the right hand side, which was to be shown.

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