factorise y^2 - 169?????????????
= y^2 - 169= (y)^2 - (13)^2= (y + 2)(y - 2)
Step 1. Rewrite it in the form: \(a^{2} - b^{2}\), where a = y and b = 13\(y^{2} - 13^{2}\)Step 2. Use Difference of Squares: \(a^{2} - b^{2} =(a+b)(a-b)\)\((y+13)(y-13)\)Done!
