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denis23 [38]
3 years ago
6

Can someone please help me!!

Mathematics
1 answer:
Sloan [31]3 years ago
4 0

Answer:

<h2>x = 6</h2>

Step-by-step explanation:

Use Angle Bisector theorem (look at the picture).

We have the equation:

\dfrac{3}{x}=\dfrac{x-4}{4}        <em>cross multiply</em>

x(x-4)=(3)(4)          <em>use the distributive property</em>

x^2-4x=12           <em>subtract 12 from both sides</em>

x^2-4x-12=0\\\\x^2+2x-6x-12=0\\\\x(x+2)-6(x+2)=0\\\\(x+2)(x-6)=0\iff x+2=0\ \vee\ x-6=0

x+2=0        <em>subtract 2 from both sides</em>

x=-2

x-6=0       <em>add 6 to both sides</em>

x=6

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