Why doesn’t (a+b)²+bx+c equal a²+b²
?
In this video, I explain where the middle term comes from when squaring a binomial and why so many students make this common mistake. Instead of just memorizing a formula, you’ll see the logic behind the expansion and understand why the result includes the 2ab term.
You’ll learn:
• Why (a+b)²≠a²+b²
• Where the middle term comes from
• How to correctly square a binomial
• Common mistakes to avoid
• How to check your work
This lesson is perfect for Algebra 1, Algebra 2, Integrated Math, and ACT/SAT preparation.
📝 Key Question:
Why does squaring a binomial create a middle term?
