20b+(5b-1)² упростите

Question

20b+(5b-1)² упростите

Answer 1

20b+(5b-1)² = 20b + 25b² - 10b +1 = 25b² + 10b + 1 = (5b+1)²

Answer 2

20b+25b^2-10b+1=10b+25b^2+1