Q. Find the product. Simplify your answer.(z−4)(z+4)
Identify Special Case: Identify the special case that applies to the given expression.The expression (z−4)(z+4) is in the form of (a−b)(a+b).Special case: (a−b)(a+b)=a2−b2
Identify Values: Identify the values of a and b. Compare (z−4)(z+4) with (a−b)(a+b). a=zb=4
Apply Formula: Apply the difference of squares formula to expand (z−4)(z+4).(a−b)(a+b)=a2−b2(z−4)(z+4)=z2−42
Simplify Expression: Simplify z2−42. z2−42=z2−16
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