## virtus 3 years ago area between y=x^2 -2x -3 and y =3x-3

1. saifoo.khan

Try graphing.

2. virtus

i did but i don't know how to calculate it

3. Hermeezey

Take the definite integral of one and subtract out the definite integral of the other.

4. FoolForMath

HINT: Area under curve, Integration.

5. saifoo.khan

We integrate using the limits.

6. FoolForMath

7. virtus

LOL the i like the sarcasm fool for math

8. FoolForMath

Hey vitus, long time :D

9. nbouscal

Set the equations equal to learn where they intersect and which is above the other, then take the definite integral of the lower function subtracted from the higher function, between the limits that you found.

10. virtus

i mean do you have have to split it some how and then integrate

11. nbouscal

Graphing is a good quick way to learn the limits of integration and which equation is larger.

12. Hermeezey

fine the points of interception, those will be your bounds of integration.

13. virtus
14. virtus

thats how the graph looks like, how do i account for the are under the graph

15. saifoo.khan

|dw:1338596987767:dw|

16. nbouscal

By looking at that graph you can see that the two functions intersect at x=0 and x=5, so those will be your limits of integration. They also show you that the linear function is above the quadratic function, so you subtract the quadratic function from the linear function, then integrate it from 0 to 5.

17. virtus

OHHHH is that it!!!! LOL SORRY, didn't know why i couldn't see that.

18. virtus

thanks =]