Question

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

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

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

Answer 5

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

\[a^2-4a\quad\Longrightarrow\quad a(a-4)\]

Answer 6

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

Answer 7

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

Answer 8

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

Answer 9

You can also cancel a out.

Answer 10

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

Answer 11

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

Answer 12

okay cool I didn't know that

Answer 13

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

Answer 14

Or is it?

Answer 15

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

Answer 16

What computer are you using?

Answer 17

HP

Answer 18

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

Answer 19

then open MS paint and paste

Answer 20

I know that but I broke the button

Answer 21

ah okay.

Answer 22

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

Answer 23

it okay thanks for your help