Factor completely. 5x^2 - 45
Simple...you have: \(5 x^{2} -45\)Using the box method-->>5(x+3)(x-3)Thus, your answer.
Hint: Divide both terms by 5 (that is, factor the 5 out of the given expression).You will then have 5(x^2-9). Factor (x^2-9) now.