- #1
halvizo1031
- 78
- 0
Homework Statement
Mindy solves the problem (x+4)(x-3)=8 by setting x+4=8 and x-3=8, thereby getting the solutin x=4 from both equations. she checks her answer by substituting x=4 into the original equation and finds that it works. She concludes that this quadratic equation has only one solution. if we check x=-5, it also works. she lost a solution. WHAT MISTAKE DID MINDY MAKE? WHAT MIGHT SHE NOT UNDERSTAND? WHAT PROPERTY OF FIELDS/INTEGRAL DOMAINS IS MINDY'S MISTAKE RELATED TO?
Homework Equations
The Attempt at a Solution
If she were to first FOIL, subtract 8 from both sides, and solve for x, then she would get both solutions. BUT, i am stuck in explaining what she might not understand and what fields/integral domains is her mistake related to...