Question

сделайте пожалуйста срочно

Answer 1

1) (a-4b)² - 8ab - 17b = a² - 8ab + 16b² - 8ab - 17b = a - 16ab + 16b² - 17b

3) $(5a-6)^{2} - (5a-6) * (5a+6) = (5a - 6) * (5a - 6 - (5a+6)) = (5a-6) *  ( 5a - 6 -5a-6) = (5a-6) * (-12) = -12 (5a-6)$

5) $(9-8b) * (2b+3) + (4b-1)^{2} = 18b+27-16b^{2} - 24b + 16b^{2} - 8b +1= -14b + 28$