Explanation
Correct answer: A.
Choice A is correct. By distributing the minus sign through the expression , the given expression can be rewritten as , which is equivalent to . Combining like terms gives , or .
Desmos solution:
Note: Create a list of x values. Use regression to fit the original expression to the form , giving and .
Enter in Desmos:
Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice B
Choice B is incorrect and may be the result of failing to distribute the minus sign appropriately through the second term and simplifying the expression .
Choice C
Choice C is incorrect and may be the result of multiplying the expressions and .
Choice D
Choice D is incorrect and may be the result of multiplying the expressions and .
Student discussion
jarvis 0 likes
Note: The listed m-values make the original expression and choice A print the same outputs.