Question Prompt: Question prompt: What is the factored form of the expression 1−64r6?
Recognize as Difference of Squares: Recognize the expression as a difference of squares.The expression 1−64r6 can be written as 12−(8r3)2, which is a difference of two squares.
Apply Formula: Apply the difference of squares formula.The difference of squares formula is a2−b2=(a−b)(a+b). Here, a=1 and b=8r3.
Factor Using Formula: Factor the expression using the formula.Substitute a and b into the formula to get (1−8r3)(1+8r3).
Check Factored Expression: Check the factored expression.(1−8r3)(1+8r3) when multiplied out should give the original expression 1−64r6. Let's check:(1−8r3)(1+8r3)=12−(8r3)2=1−64r6, which matches the original expression.