Mathieu is finding the x-intercepts of the function f(x)=x^2+4x+3. His world is shown below.
(In the photo)
The Answer is:
(He set the factored expressions equal to each other)
I learned that the hard way trial and error >~<
Which error did Mathieu make?
He factored incorrectly.
He did not use the constant as the x-intercept.
(He set the factored expressions equal to each other.)
He incorrectly solved the equation x + 3 = x + 1.
