## anonymous one year ago Unit 6 Rational Expression Multiply. (a - 4) x 2a a^2 - 4a (a + 3)(a - 1) A. 2a^2 a - 1 B. 2 a - 1 C. 2a a + 1 D. 2a 2 - 1

1. geerky42

Can you take screenshot of problem? Because it's hard to read here...

2. anonymous

I can't it doesn't work I will trying and use equation

3. geerky42

Why doesn't screenshot work? What computer are you using?/

4. anonymous

$\frac{ (a - 4) }{ a^2 - 4a } x \frac{ 2a }{ (a + 3)(a - 1) }$

5. geerky42

You can factor $$a^2-4a$$, just factor $$a$$ out; $a^2-4a\quad\Longrightarrow\quad a(a-4)$

6. geerky42

So you have $\frac{ (a - 4) }{ a(a - 4) } \times \frac{ 2a }{ (a + 3)(a - 1) }$

7. anonymous

okay so next is to cross out (a - 4)

8. geerky42

$\frac{ \cancel{(a - 4)} }{ a\cancel{(a - 4)} } \times \frac{ 2a }{ (a + 3)(a - 1) }$$\dfrac{1}{a}\times\frac{ 2a }{ (a + 3)(a - 1) }$

9. geerky42

You can also cancel a out.

10. geerky42

$\dfrac{1}{\cancel a}\times\frac{ 2\cancel a }{ (a + 3)(a - 1) }$

11. geerky42

Now you are left with $$\dfrac2{(a+3)(a-1)}$$

12. anonymous

okay cool I didn't know that

13. geerky42

That's weird, it's not in options.

14. geerky42

Or is it?

15. anonymous

I don't know it doesn't show in my text book

16. geerky42

What computer are you using?

17. anonymous

HP

18. geerky42

Then there should be PrtScr on your keyboard, right? you can take screenshot by press that

19. geerky42

then open MS paint and paste

20. anonymous

I know that but I broke the button

21. geerky42

ah okay.

22. geerky42

well, I don't know what to do from here, sorry.

23. anonymous

it okay thanks for your help