Question

One number is 2 more than another. the difference between their squares is 60 what are the numbers

Answer 1

Expand (x+2)^2: x^2 + 4x + 4 : remember that (a+b)^2 = a^2 + 2ab + b^2
So: x^2 + 4x + 4 - x^2 = 60