1) (m+4)*(m-4) = m^2 - 16
2) (5n-p)*(5n+p) = 25n^2 - p^2
3) (12a+7b)*(12a-7b) = 144a^2 - 49b^2
4) (10x^2 - y^2)*(10x^4 + y^2) = 100x^6 - 10x^2y^2 - 10x^2y^2 + y^4 = 100x^6 - 20x^2y^2 + y^4
1) (m+4)*(m-4) = m^2 - 16
2) (5n-p)*(5n+p) = 25n^2 - p^2
3) (12a+7b)*(12a-7b) = 144a^2 - 49b^2
4) (10x^2 - y^2)*(10x^4 + y^2) = 100x^6 - 10x^2y^2 - 10x^2y^2 + y^4 = 100x^6 - 20x^2y^2 + y^4