Factor completely: \[ 49-t^{2}= \]

Step 1 ：Given expression is \(49 - t^2\)

Step 2 ：This is a difference of squares, which is a special case in algebra where the expression \(a^2 - b^2\) can be factored into \((a - b)(a + b)\)

Step 3 ：Here, \(a = 7\) (since \(7^2 = 49\)) and \(b = t\) (since \(t^2 = t^2\))

Step 4 ：So, the expression \(49 - t^2\) can be factored as \((7 - t)(7 + t)\)

Step 5 ：\(\boxed{(7 - t)(7 + t)}\) is the final answer