Learn how to factor the difference of two squares

The video tutorial covers solving a math problem using the difference of squares formula. The teacher introduces the problem, explains the formula a^2 - b^2 = (a + b)(a - b), and guides students on identifying the variables a and b. The expression is then rewritten to demonstrate the application of the formula.

What is the initial task the teacher plans to undertake?

• Solve two problems

• Review previous material

• Solve number 7 only

• Explain a new concept

Which formula represents the difference of squares?

• a^2 - b^2 = (a + b)(a - b)

• a^2 + b^2 = (a - b)(a + b)

• a^2 + b^2 = (a + b)(a - b)

• a^2 - b^2 = (a - b)(a - b)

What is the first step in applying the difference of squares formula?

• Identify the values of a and b

• Add a and b

• Multiply a and b

• Subtract b from a

How does the teacher rewrite the expression r^2 - 2^2?

• r^2 + 2^2

• r^2 - 4

• r^2 - 2

• r^2 - 2^2

What is the purpose of rewriting r^2 - 2^2 in the given context?

• To find the value of r

• To apply the difference of squares formula

• To simplify the expression

• To change the problem