Question

multiply.
(y - 7)(y + 7)
simplify your answer.

Explanation:

Step1: Apply the difference of squares formula

The difference of squares formula is \((a - b)(a + b)=a^2 - b^2\). Here, \(a = y\) and \(b = 7\).
So, \((y - 7)(y + 7)=y^2-7^2\)

Step2: Calculate \(7^2\)

\(7^2 = 49\), so the expression becomes \(y^2 - 49\)

Answer:

\(y^2 - 49\)