Question

William and Stephanie have ages that are consecutive odd integers. The product of their ages is 255. Which equation could be used to find Williams age, W, if he is the younger one?
1) w^2 + 2w = 255
2) w^2 - 2w = 255
3) w^2 + 2 = 255
4) w^2 - 2 = 255

Answer 1

If we are talking about two consecutive odd integers, let's take one of them with w and the next one is (w+2). Then, we can set an equation, which is $w(w+2)=255$. If we open the brackets, we'll obtain $w^{2}+2w=255$. The correct answer is A)