module 1 lesson 28: a focus on square roots
TRANSCRIPT
Module 1 Lesson 28: A Focus on Square Roots
Warm Up: Simplify.
Discussion
Jason solves the following problem and
says that the answer is x=4. Why is this
not true?
Extraneous solutions happen
when we solve problems
involving radicals because you
cannot take the square root of
a negative number. Any time
we remove a radical with an
even index, we should always
check for an extraneous
solution!