I missed a few weeks of school, and am just forgetting a lot about factoring
6r-7r-3=0
-1r-3=0
-r=3
r=-3
6r^2 + 7r -3 = 0
(3r - 1)(2r + 3) = 0
3r - 1 = 0 so r = 1/3
2r + 3 = 0 so r = -3/2
I think you mean 6r^2 + 7r - 3 = 0
(3r - 1) (2r +3) = 0
Answer is 1/3 or -3/2.
We can use the Quadratic formula or the cross factorising method to factorise it.
Quadratic formula:
http://www.purplemath.com/modules/quadform.htm
Cross factorising method.
http://www.youtube.com/watch?v=2dqAPKgC-KI
magic
Comments
6r-7r-3=0
-1r-3=0
-r=3
r=-3
6r^2 + 7r -3 = 0
(3r - 1)(2r + 3) = 0
3r - 1 = 0 so r = 1/3
2r + 3 = 0 so r = -3/2
I think you mean 6r^2 + 7r - 3 = 0
(3r - 1) (2r +3) = 0
Answer is 1/3 or -3/2.
We can use the Quadratic formula or the cross factorising method to factorise it.
Quadratic formula:
http://www.purplemath.com/modules/quadform.htm
Cross factorising method.
http://www.youtube.com/watch?v=2dqAPKgC-KI
magic