## anonymous 4 years ago Solve. x^2 – 4x = 0 a. x = 0 and x = –4 b. x = 2 and x = –2 c. x = 4 and x = 0 d. x = 0

1. myininaya

do you know how to factor x^2-4x

2. anonymous

yes, its x - 4, right?

3. myininaya

$x(x-4)$ since $x(x-4)=x \cdot x - x \cdot 4=x^2-4x$

4. myininaya

so we have the following we need to solve $x(x-4)=0$ which implies x=0 or x-4=0

5. anonymous

ok

6. anonymous

and x = 4?

7. anonymous

is it?