SOLUTION: Hello, If someone could help me solve for this problem from, the Book: Intermediate Algebra by Mark Dugopolski, I would greatly appreciate it. Evaluate each expression using

Algebra ->  Decimal-numbers -> SOLUTION: Hello, If someone could help me solve for this problem from, the Book: Intermediate Algebra by Mark Dugopolski, I would greatly appreciate it. Evaluate each expression using       Log On


   

Question 303676: Hello,
If someone could help me solve for this problem from, the Book: Intermediate Algebra by Mark Dugopolski, I would greatly appreciate it.
Evaluate each expression using a = - 1, b = 2, and c = - 3
(a - c)(a + c)
{I was thinking: -1 - -3 * -1 + -3 (4 * -4 = Answer: -16) Is this correct?}
Please let me know
Thank you
Answer by Stitch(470) About Me  (Show Source):
You can put this solution on YOUR website!
Given: %28A+-+C%29%2A%28A+%2B+C%29, where A = -1, B = 2, C = -3
-16 Is not the correct answer. I also noticed that B is not used in the equation. Using the equation that you have posted, this is the solution:
----------------
%28A+-+C%29%2A%28A+%2B+C%29 Substitute
%28-1+-+-3%29%2A%28-1+%2B+-3%29
You must do the operations inside the parenthesis first.
%282%29%2A%28-4%29 Simplify
highlight%28-8%29