SOLUTION: what is the product of (x-3) and (x-5)

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: what is the product of (x-3) and (x-5)      Log On


   



Question 118596: what is the product of (x-3) and (x-5)
Answer by jpa65@hotmail.com(9) About Me  (Show Source):
You can put this solution on YOUR website!
so it is like this
(x-3)(x-5)
If you know this, use the foil method like so,
(a-b)(a-c)
so you would do (or in these terms)...
1. a*a (x*x= x^2)
2. -b* -c(-3*-5= 15)
3. -b*a(-3*x= -3x)
4. -c*a(x*-5= -5x)
which would come out to..
a^2 + bc -ba - ca
so in this case...
x^2-3x-5x+15
but to simplify even further...
x^2-8x+15
hope this helps!!!