Question 33617
{{{4r^2}}}+3r-10
First of all you kno you are going to have a + and a - in the parenthesis;
(_ + _ )(_ - _)
Now you need to list your factors of 4;
1,4; 2;2
List factors of 10;
10,1; 2;5
Now you need to figure out which of these work; to do that;
lwts look at 1,4 and 2,5;
we multiply; 1*2 and 4*5; then add the answers;
2-20=-18 so we know that is wrong;
lets look at;
1*5=5
4*2=8, this may work;
Now by looking at the original trinomial e know the larger number is going to be +, because there is a +3;
(r+2)(4r-5)
I know this is hard to understand just by trying to read my explanation. I hope this helps some. If you have more questions e-mail me.
=)