## elegant11 2 years ago Solve |2x – 4| < 6 x < –1 or x > 5 x < 5 1 < x < 5 –1 < x < 5

1. geerky42

HINT: |2x – 4| < 6 is same thing as -6 < 2x – 4 < 6

2. Butterfly16

|dw:1358735372324:dw|Can you solve for x? :o)

3. geerky42

Actually, 2x-4 > -6

4. elegant11

is x 5 and 1

5. geerky42

None.

6. geerky42

-6 < 2x – 4 < 6 Try to isolate x.

7. elegant11

is –1 < x < 5 the answer?

8. geerky42

Yes!

9. geerky42

Is this clear?

10. elegant11

yes...can you help me with another question?

11. geerky42

Sure.

12. elegant11

Describe the end behavior of f(x) = 2x^4 – 5x + 1.

13. elegant11

do you understand the question?

14. geerky42

Yeah, and you can quickly use my knowledge of end behavior. Just take a look at the leading term (2x⁴). We know that it is even function, which mean both ends are going at the same direction. Now, take a look at leading coefficient. It is positive so both ends are going up. Is this clear?

15. elegant11

since there are two pairs does ++, -+ sound right?

16. geerky42

Yeah, I guess.

17. elegant11

well here are the other choices ++, -- +-, -+ +-, --