Multiplying Polynomials and Simplifying Expressions
Question 24 • 26MATH_Recovery_Alg1B22
x2 – 9 can be factored using the formula.
Answer
A
difference-of-squares
B
difference-of-cubes
C
sum-of-cubes
Explanation
Rewrite x2 as x². Then x² − 9 = x² − 3², which is a difference of two squares. It factors as (x − 3)(x + 3), so the correct choice is difference-of-squares.
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