1) (3+5x)^2-9 = 9 + 30x + 25x^2 - 9 = 25x^2 + 30x 2) 25 - (4m - 5) = 25 - 4m + 5 = -4m + 30 3) 9p^2(4+3p)^2 = 9p^2(16 + 24p + 9p^2) = 144p^2 + 216p^3 + 81p^4 4) (-7k + 1)^2 + 14k = 49k^2 - 14k + 1 + 14k = 49k^2 + 1
1) (3+5x)^2-9 = 9 + 30x + 25x^2 - 9 = 25x^2 + 30x
2) 25 - (4m - 5) = 25 - 4m + 5 = -4m + 30
3) 9p^2(4+3p)^2 = 9p^2(16 + 24p + 9p^2) = 144p^2 + 216p^3 + 81p^4
4) (-7k + 1)^2 + 14k = 49k^2 - 14k + 1 + 14k = 49k^2 + 1