(3 + 5x)^2 - 6(5x + 2)= (3 + 5x)(3 + 5x) - 6(5x + 2)= 9 + 15x + 15x + 25x^2 - 30x - 12= 25x^2 + 30x - 3
(3 + 5x)^2 - 6(5x + 2)
= (3 + 5x)(3 + 5x) - 6(5x + 2)
= 9 + 15x + 15x + 25x^2 - 30x - 12
= 25x^2 + 30x - 3