SOLUTION: Sorry this is calculus but I really need some help I keep on getting different answers using the different examples ive got please help me Evaluate the definite integral (the in

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Sorry this is calculus but I really need some help I keep on getting different answers using the different examples ive got please help me Evaluate the definite integral (the in      Log On


   



Question 573035: Sorry this is calculus but I really need some help I keep on getting different answers using the different examples ive got please help me
Evaluate the definite integral (the integral symbol with 2 at the top and 1 at the bottom)3x^2-2x dx
My answers have been 0,1.5,4 and 4.5

Found 2 solutions by stanbon, Alan3354:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Evaluate the definite integral (the integral symbol with 2 at the top and 1 at the bottom)3x^2-2x dx
----
Integrate 3x^2-2x to get F(x) = x^3-x
---
Then evaluate as F(2)-F(1)
= (2^3-2)-(1^3-1)
---
= 6
============
cheers,
Stan H.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Evaluate the definite integral (the integral symbol with 2 at the top and 1 at the bottom)3x^2-2x dx
My answers have been 0,1.5,4 and 4.5
--------------
Int(x) = x^3 - x^2 + C
Int(2) = 8 - 4 = 4 (Ignore the C)
Int(1) = 1 - 1 = 0
------------------ Subtract
= 4